24031554132_MOH. RASYA AL KHALIFI_2024B

Pada tugas pengantar mata kuliah analisis multivariat ini yang akan dilakukan adalah mencari correlation matrix, variance covariance matrix, eigen values, dan eigen vector. Dataset yang digunakan adalah dataset Maternal Health Risk dari uci machine learning dengan 6 feature antara lain:

  1. Age : Usia wanita selama masa kehamilan
  2. SystolicBP : Nilai tekanan darah maksimum dalam mmHg
  3. DiastolicBP: Nilai tekanan darah yang lebih rendah dalam mmHg
  4. BS : Kadar glukosa darah dinyatakan dalam konsentrasi molar
  5. BodyTemp : Suhu tubuh
  6. HeartRate : Detak jantung istirahat normal

link dataset : https://archive.ics.uci.edu/dataset/863/maternal+health+risk

READ DATASET

data <- read.csv("Maternal Health Risk Data Set.csv")

SELECT FEATURES WITHOUT TARGET

Data yang digunakan dalam analisis adalah dataset tanpa target/label, dalam hal ini target dihapus atau hanya dipilih feature yang memiliki nilai numerik yaitu age, systoliCB, DiastoliCB, BS, BodyTemp, dan HeartRate.

data_numeric <- data[, sapply(data, is.numeric)]
data_numeric
##      Age SystolicBP DiastolicBP    BS BodyTemp HeartRate
## 1     25        130          80 15.00     98.0        86
## 2     35        140          90 13.00     98.0        70
## 3     29         90          70  8.00    100.0        80
## 4     30        140          85  7.00     98.0        70
## 5     35        120          60  6.10     98.0        76
## 6     23        140          80  7.01     98.0        70
## 7     23        130          70  7.01     98.0        78
## 8     35         85          60 11.00    102.0        86
## 9     32        120          90  6.90     98.0        70
## 10    42        130          80 18.00     98.0        70
## 11    23         90          60  7.01     98.0        76
## 12    19        120          80  7.00     98.0        70
## 13    25        110          89  7.01     98.0        77
## 14    20        120          75  7.01    100.0        70
## 15    48        120          80 11.00     98.0        88
## 16    15        120          80  7.01     98.0        70
## 17    50        140          90 15.00     98.0        90
## 18    25        140         100  7.01     98.0        80
## 19    30        120          80  6.90    101.0        76
## 20    10         70          50  6.90     98.0        70
## 21    40        140         100 18.00     98.0        90
## 22    50        140          80  6.70     98.0        70
## 23    21         90          65  7.50     98.0        76
## 24    18         90          60  7.50     98.0        70
## 25    21        120          80  7.50     98.0        76
## 26    16        100          70  7.20     98.0        80
## 27    19        120          75  7.20     98.0        66
## 28    22        100          65  7.20     98.0        70
## 29    49        120          90  7.20     98.0        77
## 30    28         90          60  7.20     98.0        82
## 31    20        100          90  7.10     98.0        88
## 32    23        100          85  7.10     98.0        66
## 33    22        120          90  7.10     98.0        82
## 34    21        120          80  7.10     98.0        77
## 35    21         75          50  6.10     98.0        70
## 36    12         95          60  6.10    102.0        60
## 37    60        120          80  6.10     98.0        75
## 38    55        100          65  6.10     98.0        66
## 39    45        120          95  6.10     98.0        66
## 40    35        100          70  6.10     98.0        66
## 41    22        120          85  6.10     98.0        88
## 42    23        120          90  6.10     98.0        60
## 43    25         90          70  6.10     98.0        80
## 44    30        120          80  6.10     98.0        70
## 45    23        120          90  6.10     98.0        70
## 46    32        120          90  7.50     98.0        70
## 47    42        120          80  7.50     98.0        70
## 48    23         90          60  7.50     98.0        76
## 49    15         76          49  7.50     98.0        77
## 50    15        120          80  7.00     98.0        70
## 51    25        120          80  7.00     98.0        66
## 52    22        100          65  7.00     98.0        80
## 53    35        100          70  7.00     98.0        60
## 54    19        120          85  7.00     98.0        60
## 55    60         90          65  7.00     98.0        77
## 56    23        120          90  6.70     98.0        70
## 57    32        120          90  6.40     98.0        70
## 58    42        120          80  6.40     98.0        70
## 59    23         90          60  6.40     98.0        76
## 60    15         76          49  6.40     98.0        77
## 61    15        120          80  7.20     98.0        70
## 62    15         80          60  7.00     98.0        80
## 63    12         95          60  7.20     98.0        77
## 64    29         90          70  6.70     98.0        80
## 65    31        120          60  6.10     98.0        76
## 66    29        130          70  6.70     98.0        78
## 67    17         85          60  9.00    102.0        86
## 68    19        120          80  7.00     98.0        70
## 69    20        110          60  7.00    100.0        70
## 70    32        120          65  6.00    101.0        76
## 71    26         85          60  6.00    101.0        86
## 72    29        130          70  7.70     98.0        78
## 73    19        120          80  7.00     98.0        70
## 74    54        130          70 12.00     98.0        67
## 75    44        120          90 16.00     98.0        80
## 76    23        130          70  6.90     98.0        70
## 77    22         85          60  6.90     98.0        76
## 78    55        120          90 12.00     98.0        70
## 79    35        120          80  6.90     98.0        78
## 80    21         90          60  6.90     98.0        86
## 81    16         90          65  6.90     98.0        76
## 82    33        115          65  7.00     98.0        70
## 83    12         95          60  6.90     98.0        65
## 84    28        120          90  6.90     98.0        70
## 85    21         90          65  6.90     98.0        76
## 86    18         90          60  6.90     98.0        70
## 87    21        120          80  6.90     98.0        76
## 88    16        100          70  6.90     98.0        80
## 89    19        120          75  6.90     98.0        66
## 90    23        100          85  6.90     98.0        66
## 91    22        120          90  7.80     98.0        82
## 92    60        120          85 15.00     98.0        60
## 93    13         90          65  7.80    101.0        80
## 94    23        120          90  7.80     98.0        60
## 95    28        115          60  7.80    101.0        86
## 96    50        120          80  7.80     98.0        70
## 97    29        130          70  7.80     98.0        78
## 98    19        120          80  7.00     98.0        70
## 99    19        120          85  7.80     98.0        60
## 100   60         90          65  6.80     98.0        77
## 101   55        120          90  6.80     98.0        66
## 102   25        120          80  6.80     98.0        66
## 103   48        140          90 15.00     98.0        90
## 104   25        140         100  6.80     98.0        80
## 105   23        140          90  6.80     98.0        70
## 106   34         85          60 11.00    102.0        86
## 107   50        140          90 15.00     98.0        90
## 108   25        140         100  6.80     98.0        80
## 109   42        140         100 18.00     98.0        90
## 110   32        140         100  7.90     98.0        78
## 111   50        140          95 17.00     98.0        60
## 112   38        135          60  7.90    101.0        86
## 113   39         90          70  9.00     98.0        80
## 114   30        140         100 15.00     98.0        70
## 115   63        140          90 15.00     98.0        90
## 116   25        140         100  7.90     98.0        80
## 117   30        120          80  7.90    101.0        76
## 118   55        140         100 18.00     98.0        90
## 119   32        140         100  7.90     98.0        78
## 120   30        140         100 15.00     98.0        70
## 121   48        120          80 11.00     98.0        88
## 122   49        140          90 15.00     98.0        90
## 123   25        140         100  7.50     98.0        80
## 124   40        160         100 19.00     98.0        77
## 125   32        140          90 18.00     98.0        88
## 126   35        140         100  7.50     98.0        66
## 127   54        140         100 15.00     98.0        66
## 128   55        140          95 19.00     98.0        77
## 129   29        120          70  9.00     98.0        80
## 130   48        120          80 11.00     98.0        88
## 131   40        160         100 19.00     98.0        77
## 132   32        140          90 18.00     98.0        88
## 133   35        140         100  7.50     98.0        66
## 134   54        140         100 15.00     98.0        66
## 135   40        120          95 11.00     98.0        80
## 136   22         90          60  7.50    102.0        60
## 137   40        120          85 15.00     98.0        60
## 138   55        140          95 19.00     98.0        77
## 139   50        130         100 16.00     98.0        75
## 140   18        120          80  6.90    102.0        76
## 141   32        140         100  6.90     98.0        78
## 142   17         90          60  6.90    101.0        76
## 143   17         90          63  6.90    101.0        70
## 144   25        120          90  6.70    101.0        80
## 145   17        120          80  6.70    102.0        76
## 146   14         90          65  7.00    101.0        70
## 147   15         80          60  6.70     98.0        80
## 148   15        100          65  6.70     98.0        76
## 149   12         95          60  6.70     98.0        77
## 150   37        120          90 11.00     98.0        88
## 151   18        100          70  6.70     98.0        76
## 152   21        100          85  6.70     98.0        70
## 153   17        110          75 12.00    101.0        76
## 154   25        120          90  7.50     98.0        80
## 155   23         85          65  7.50     98.0        70
## 156   12         95          60  7.50     98.0        65
## 157   28        120          90  7.50     98.0        70
## 158   40        120          90 12.00     98.0        80
## 159   55        129          85  7.50     98.0        88
## 160   25        100          90  7.50     98.0        76
## 161   35        120          80  7.50     98.0        80
## 162   21         90          65  7.50     98.0        76
## 163   18         90          60  7.50     98.0        70
## 164   21        120          80  7.50     98.0        76
## 165   16        100          70  7.20     98.0        80
## 166   19        120          75  7.20     98.0        66
## 167   40        160         100 19.00     98.0        77
## 168   32        140          90 18.00     98.0        88
## 169   22        100          65  7.20     98.0        70
## 170   49        120          90  7.20     98.0        77
## 171   28         90          60  7.20     98.0        82
## 172   12         90          60  7.90    102.0        66
## 173   20        100          90  7.10     98.0        88
## 174   23        100          85  7.10     98.0        66
## 175   22        120          90  7.10     98.0        82
## 176   21        120          80  7.10     98.0        77
## 177   35        140         100  8.00     98.0        66
## 178   54        140         100 15.00     98.0        66
## 179   40        120          95 11.00     98.0        80
## 180   21         75          50  6.10     98.0        70
## 181   12         95          60  6.10    102.0        60
## 182   60        120          85 15.00     98.0        60
## 183   55        140          95 19.00     98.0        77
## 184   50        130         100 16.00     98.0        75
## 185   60        120          80  6.10     98.0        75
## 186   55        100          65  6.10     98.0        66
## 187   45        120          95  6.10     98.0        66
## 188   35        100          70  6.10     98.0        66
## 189   22        120          85  6.10     98.0        88
## 190   13         90          65  7.90    101.0        80
## 191   23        120          90  6.10     98.0        60
## 192   17         90          65  6.10    103.0        67
## 193   28         83          60  8.00    101.0        86
## 194   50        120          80 15.00     98.0        70
## 195   25         90          70  6.10     98.0        80
## 196   30        120          80  6.10     98.0        70
## 197   31        120          60  6.10     98.0        76
## 198   23        120          90  6.10     98.0        70
## 199   29        130          70  6.10     98.0        78
## 200   17         85          60  9.00    102.0        86
## 201   32        120          90  7.50     98.0        70
## 202   42        120          80  7.50     98.0        70
## 203   23         90          60  7.50     98.0        76
## 204   19        120          80  7.00     98.0        70
## 205   15         76          49  7.50     98.0        77
## 206   33        120          75 10.00     98.0        70
## 207   48        120          80 11.00     98.0        88
## 208   15        120          80  7.00     98.0        70
## 209   25        120          80  7.00     98.0        66
## 210   22        100          65  7.00     98.0        80
## 211   50        140          95 17.00     98.0        60
## 212   35        100          70  7.00     98.0        60
## 213   19        120          85  7.00     98.0        60
## 214   60         90          65  7.00     98.0        77
## 215   28         85          60  9.00    101.0        86
## 216   50        140          80  6.70     98.0        70
## 217   29         90          70  6.70     98.0        80
## 218   30        140         100 15.00     98.0        70
## 219   31        120          60  6.10     98.0        76
## 220   23        120          90  6.70     98.0        70
## 221   29        130          70  6.70     98.0        78
## 222   17         85          60  9.00    102.0        86
## 223   32        120          90  6.40     98.0        70
## 224   42        120          80  6.40     98.0        70
## 225   23         90          60  6.40     98.0        76
## 226   19        120          80  7.00     98.0        70
## 227   15         76          49  6.40     98.0        77
## 228   29        120          75  7.20    100.0        70
## 229   48        120          80 11.00     98.0        88
## 230   15        120          80  7.20     98.0        70
## 231   50        140          90 15.00     98.0        77
## 232   25        140         100  7.20     98.0        80
## 233   55        140          80  7.20    101.0        76
## 234   20        110          60  7.00    100.0        70
## 235   40        140         100 18.00     98.0        77
## 236   28        120          80  9.00    102.0        76
## 237   32        140         100  8.00     98.0        70
## 238   17         90          60 11.00    101.0        78
## 239   17         90          63  8.00    101.0        70
## 240   25        120          90 12.00    101.0        80
## 241   17        120          80  7.00    102.0        76
## 242   19         90          65 11.00    101.0        70
## 243   15         80          60  7.00     98.0        80
## 244   32        120          65  6.00    101.0        76
## 245   12         95          60  7.20     98.0        77
## 246   37        120          90 11.00     98.0        88
## 247   18        100          70  6.80     98.0        76
## 248   21        100          85  6.90     98.0        70
## 249   17        110          75 13.00    101.0        76
## 250   25        120          90 15.00     98.0        80
## 251   10         85          65  6.90     98.0        70
## 252   12         95          60  6.90     98.0        65
## 253   28        120          90  6.90     98.0        70
## 254   40        120          90  6.90     98.0        80
## 255   55        110          85  6.90     98.0        88
## 256   25        100          90  6.90     98.0        76
## 257   35        120          80  6.90     98.0        80
## 258   21         90          65  6.90     98.0        76
## 259   18         90          60  6.90     98.0        70
## 260   21        120          80  6.90     98.0        76
## 261   16        100          70  6.90     98.0        80
## 262   19        120          75  6.90     98.0        66
## 263   40        160         100 19.00     98.0        77
## 264   32        140          90 18.00     98.0        88
## 265   22        100          65  6.90     98.0        70
## 266   49        120          90  6.90     98.0        77
## 267   28         90          60  6.90     98.0        82
## 268   12         90          60  8.00    102.0        66
## 269   20        100          90  7.00     98.0        88
## 270   23        100          85  7.00     98.0        66
## 271   22        120          90  7.00     98.0        82
## 272   21        120          80  7.00     98.0        77
## 273   35        140         100  9.00     98.0        66
## 274   54        140         100 15.00     98.0        66
## 275   40        120          95 11.00     98.0        80
## 276   21         75          50  7.70     98.0        60
## 277   12         90          60 11.00    102.0        60
## 278   60        120          85 15.00     98.0        60
## 279   55        140          95 19.00     98.0        77
## 280   50        130         100 16.00     98.0        76
## 281   60        120          80  7.70     98.0        75
## 282   55        100          65  7.70     98.0        66
## 283   45        120          95  7.70     98.0        66
## 284   35        100          70  7.70     98.0        66
## 285   22        120          85  7.70     98.0        88
## 286   13         90          65  9.00    101.0        80
## 287   23        120          90  7.70     98.0        60
## 288   17         90          65  7.70    103.0        67
## 289   26         85          60  6.00    101.0        86
## 290   50        120          80  7.70     98.0        70
## 291   19         90          70  7.70     98.0        80
## 292   30        120          80  7.70     98.0        70
## 293   31        120          60  6.10     98.0        76
## 294   23        120          80  7.70     98.0        70
## 295   29        130          70  7.70     98.0        78
## 296   17         85          60  6.30    102.0        86
## 297   32        120          90  7.70     98.0        70
## 298   42        120          80  7.70     98.0        70
## 299   23         90          60  7.70     98.0        76
## 300   19        120          80  7.00     98.0        70
## 301   15         75          49  7.70     98.0        77
## 302   40        120          75  7.70     98.0        70
## 303   48        120          80 11.00     98.0        88
## 304   15        120          80  7.70     98.0        70
## 305   25        120          80  7.70     98.0        66
## 306   22        100          65  6.90     98.0        80
## 307   12        120          95  6.90     98.0        60
## 308   35        100          70  6.90     98.0        60
## 309   19        120          85  6.90     98.0        60
## 310   60         90          65  6.90     98.0        77
## 311   55        120          90  6.90     98.0        76
## 312   35         90          65  6.90     98.0        75
## 313   51         85          60  6.90     98.0        66
## 314   62        120          80  6.90     98.0        66
## 315   25         90          70  6.90     98.0        66
## 316   21        120          80  6.90     98.0        88
## 317   22        120          60 15.00     98.0        80
## 318   55        120          90 18.00     98.0        60
## 319   54        130          70 12.00     98.0        67
## 320   35         85          60 19.00     98.0        86
## 321   43        120          90 18.00     98.0        70
## 322   12        120          80  6.90     98.0        80
## 323   65         90          60  6.90     98.0        70
## 324   60        120          80  6.90     98.0        76
## 325   25        120          90  6.90     98.0        70
## 326   22         90          65  6.90     98.0        78
## 327   66         85          60  6.90     98.0        86
## 328   56        120          80 13.00     98.0        70
## 329   35         90          70  6.90     98.0        70
## 330   43        120          80 15.00     98.0        76
## 331   35        120          60  6.90     98.0        70
## 332   44        120          90 16.00     98.0        80
## 333   23        130          70  6.90     98.0        70
## 334   22         85          60  6.90     98.0        76
## 335   55        120          90 12.00     98.0        70
## 336   35        120          80  6.90     98.0        78
## 337   21         90          60  6.90     98.0        86
## 338   45        120          80  6.90    103.0        70
## 339   70         85          60  6.90    102.0        70
## 340   65        120          90  6.90    103.0        76
## 341   55        120          80  6.90    102.0        80
## 342   45         90          60 18.00    101.0        70
## 343   22        120          80  6.90    103.0        76
## 344   16         90          65  6.90     98.0        76
## 345   12         95          60  6.90     98.0        77
## 346   37        120          90 11.00     98.0        88
## 347   18        100          70  6.90     98.0        76
## 348   21        100          85  6.90     98.0        70
## 349   17        110          75  6.90    101.0        76
## 350   25        120          90  6.90     98.0        80
## 351   33        115          65  7.00     98.0        70
## 352   12         95          60  6.90     98.0        65
## 353   28        120          90  6.90     98.0        70
## 354   40        120          90  6.90     98.0        80
## 355   55        110          85  6.90     98.0        88
## 356   25        100          90  6.90     98.0        76
## 357   35        120          80  6.90     98.0        80
## 358   21         90          65  6.90     98.0        76
## 359   18         90          60  6.90     98.0        70
## 360   21        120          80  6.90     98.0        76
## 361   16        100          70  6.90     98.0        80
## 362   19        120          75  6.90     98.0        66
## 363   40        160         100 19.00     98.0        77
## 364   32        140          90 18.00     98.0        88
## 365   23        100          85  6.90     98.0        66
## 366   22        120          90  7.80     98.0        82
## 367   21        120          80  7.80     98.0        77
## 368   35        140         100  7.80     98.0        66
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## 370   40        120          95 11.00     98.0        80
## 371   21         75          50  7.80     98.0        60
## 372   12         90          60  7.80    102.0        60
## 373   60        120          85 15.00     98.0        60
## 374   55        140          95 19.00     98.0        77
## 375   50        130         100 16.00     98.0        75
## 376   60        120          80  7.80     98.0        75
## 377   55        100          65  7.80     98.0        66
## 378   45        120          95  7.80     98.0        66
## 379   35        100          70  7.80     98.0        66
## 380   22        120          85  7.80     98.0        88
## 381   13         90          65  7.80    101.0        80
## 382   23        120          90  7.80     98.0        60
## 383   17         90          65  7.80    103.0        67
## 384   28        115          60  7.80    101.0        86
## 385   50        120          80  7.80     98.0        70
## 386   19         90          70  7.80     98.0        80
## 387   30        120          80  7.80     98.0        70
## 388   31        120          60  6.10     98.0        76
## 389   23        120          70  7.80     98.0        70
## 390   29        130          70  7.80     98.0        78
## 391   17         85          69  7.80    102.0        86
## 392   32        120          90  7.80     98.0        70
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## 797   23        130          70  6.80     98.0        78
## 798   43        130          80 18.00     98.0        70
## 799   19        120          80  7.00     98.0        70
## 800   30        120          75  6.80     98.0        70
## 801   32        120          80  6.80     98.0        70
## 802   23        130          70  6.80     98.0        78
## 803   42        130          80 18.00     98.0        70
## 804   19        120          80  7.00     98.0        70
## 805   31        110          90  6.80    100.0        70
## 806   19        120          80  7.00     98.0        70
## 807   25        120          80  7.90     98.0        66
## 808   31        120          60  6.10     98.0        76
## 809   23        120          90  7.90     98.0        70
## 810   29        130          70  7.90     98.0        78
## 811   48        120          80 11.00     98.0        88
## 812   18        120          80  7.90    102.0        76
## 813   18         85          60  7.50    101.0        86
## 814   29        130          70  7.50     98.0        78
## 815   23        120          75  8.00     98.0        70
## 816   15        120          80  7.50     98.0        70
## 817   30        120          80  7.50    101.0        76
## 818   40        120          95 11.00     98.0        80
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## 820   50        130         100 16.00     98.0        75
## 821   28        115          60  7.50    101.0        86
## 822   31        120          60  6.10     98.0        76
## 823   23        120          80  7.50     98.0        70
## 824   29        130          70  7.50     98.0        78
## 825   22        100          65  7.50     98.0        70
## 826   49        120          90  7.50     98.0        77
## 827   28         90          60  7.50     98.0        82
## 828   12         90          60  7.50    102.0        66
## 829   20        100          90  7.50     98.0        88
## 830   23        100          85  7.50     98.0        66
## 831   22        120          90  7.50     98.0        82
## 832   21        120          80  7.50     98.0        77
## 833   60        120          80  7.50     98.0        75
## 834   50        130         100 16.00     98.0        75
## 835   17         90          65  7.50    103.0        67
## 836   29        130          70  7.50     98.0        78
## 837   19        120          80  7.00     98.0        70
## 838   19        120          85  9.00     98.0        60
## 839   30         90          65  8.00     98.0        77
## 840   28         85          60  9.00    101.0        86
## 841   50        120          80  7.00     98.0        70
## 842   39        110          70  7.90     98.0        80
## 843   29        130          70  8.00     98.0        78
## 844   17         90          60  9.00    102.0        86
## 845   32        120          90  7.00    100.0        70
## 846   42        120          90  9.00     98.0        70
## 847   36        120          90  7.00     98.0        82
## 848   30        120          80  9.00    101.0        76
## 849   15         70          50  6.00     98.0        70
## 850   10        100          50  6.00     99.0        70
## 851   12        100          50  6.40     98.0        70
## 852   12        100          50  6.00     98.0        70
## 853   23        130          70  7.01     98.0        78
## 854   32        120          90  6.90     98.0        70
## 855   19        120          80  7.00     98.0        70
## 856   20        120          75  7.01    100.0        70
## 857   48        120          80 11.00     98.0        88
## 858   30        120          80  6.90    101.0        76
## 859   18        120          80  6.90    102.0        76
## 860   17         90          60  6.90    101.0        76
## 861   17         90          63  6.90    101.0        70
## 862   25        120          90  6.70    101.0        80
## 863   17        120          80  6.70    102.0        76
## 864   13         90          65  7.90    101.0        80
## 865   31        120          60  6.10     98.0        76
## 866   29        130          70  6.10     98.0        78
## 867   19        120          80  7.00     98.0        70
## 868   28         85          60  9.00    101.0        86
## 869   50        140          80  6.70     98.0        70
## 870   29         90          70  6.70     98.0        80
## 871   31        120          60  6.10     98.0        76
## 872   29        130          70  6.70     98.0        78
## 873   17         85          60  9.00    102.0        86
## 874   19        120          80  7.00     98.0        70
## 875   20        110          60  7.00    100.0        70
## 876   32        120          65  6.00    101.0        76
## 877   27        120          70  6.80     98.0        77
## 878   27        120          70  6.80     98.0        77
## 879   32        120          90  6.80     98.0        70
## 880   23         99          60  6.80     98.0        76
## 881   15         76          49  6.80     98.0        77
## 882   15        120          80  6.80     98.0        70
## 883   29        100          70  6.80     98.0        80
## 884   35        120          60  6.10     98.0        76
## 885   32        120          90  6.80     98.0        70
## 886   23         90          60  6.80     98.0        76
## 887   15         76          49  6.80     98.0        77
## 888   20        120          75  6.80     98.0        70
## 889   48        120          80 11.00     98.0        88
## 890   15        120          80  6.80     98.0        70
## 891   30        120          80  6.80    101.0        76
## 892   18        120          80  6.80    102.0        76
## 893   17         90          60  7.90    101.0        76
## 894   15         76          49  7.90     98.0        77
## 895   19        120          75  7.90     98.0        70
## 896   48        120          80 11.00     98.0        88
## 897   15        120          80  7.90     98.0        70
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## 899   35        100          70  7.90     98.0        60
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## 902   50        120          80  7.90     98.0        70
## 903   17         85          60  7.90    102.0        86
## 904   32        120          90  7.90     98.0        70
## 905   42        120          80  7.90     98.0        70
## 906   23         90          60  7.90     98.0        76
## 907   19        120          80  7.00     98.0        70
## 908   15         76          49  7.90     98.0        77
## 909   16        120          75  7.90     98.0         7
## 910   15        120          80  7.90     98.0        70
## 911   17         70          50  7.90     98.0        70
## 912   17         90          60  7.50    101.0        76
## 913   17         90          63  7.50    101.0        70
## 914   25        120          90  7.50    101.0        80
## 915   17        120          80  7.50    102.0        76
## 916   19         90          65  7.50    101.0        70
## 917   15         80          60  7.50     98.0        80
## 918   60         90          65  7.50     98.0        77
## 919   50        120          80  7.50     98.0        70
## 920   19         90          70  7.50     98.0        80
## 921   31        120          60  6.10     98.0        76
## 922   23        120          90  7.50     98.0        70
## 923   17         85          60  7.50    102.0        86
## 924   32        120          90  7.50     98.0        70
## 925   42        120          80  7.50     98.0        70
## 926   42         90          60  7.50     98.0        76
## 927   19        120          80  7.00     98.0        70
## 928   15         78          49  7.50     98.0        77
## 929   16         70          50  7.50    100.0        70
## 930   16        100          70  7.50     98.0        80
## 931   19        120          75  7.50     98.0        66
## 932   22        100          65  7.50     98.0        70
## 933   49        120          90  7.50     98.0        77
## 934   28         90          60  7.50     98.0        82
## 935   12         90          60  7.50    102.0        66
## 936   20        100          90  7.50     98.0        88
## 937   23        100          85  7.50     98.0        66
## 938   22        120          90  7.50     98.0        82
## 939   21        120          80  7.50     98.0        77
## 940   21         75          50  7.50     98.0        60
## 941   12         90          60  7.50    102.0        60
## 942   60        120          80  7.50     98.0        75
## 943   55        100          65  7.50     98.0        66
## 944   45        120          95  7.50     98.0        66
## 945   35        100          70  7.50     98.0        66
## 946   22        120          85  7.50     98.0        88
## 947   13         90          65  7.50    101.0        80
## 948   23        120          90  7.50     98.0        60
## 949   17         90          65  7.50    103.0        67
## 950   59        120          80  7.50     98.0        70
## 951   23        120          80  7.50     98.0        70
## 952   17         85          60  7.50    102.0        86
## 953   32        120          90  7.50     98.0        70
## 954   42        120          80  7.50     98.0        70
## 955   25        140         100  7.01     98.0        80
## 956   40        140         100 18.00     98.0        90
## 957   32        140         100  6.90     98.0        78
## 958   14         90          65  7.00    101.0        70
## 959   37        120          90 11.00     98.0        88
## 960   17        110          75 12.00    101.0        76
## 961   40        120          90 12.00     98.0        80
## 962   40        160         100 19.00     98.0        77
## 963   32        140          90 18.00     98.0        88
## 964   12         90          60  7.90    102.0        66
## 965   35        140         100  8.00     98.0        66
## 966   54        140         100 15.00     98.0        66
## 967   40        120          95 11.00     98.0        80
## 968   60        120          85 15.00     98.0        60
## 969   55        140          95 19.00     98.0        77
## 970   50        130         100 16.00     98.0        75
## 971   17         90          65  6.10    103.0        67
## 972   28         83          60  8.00    101.0        86
## 973   50        120          80 15.00     98.0        70
## 974   17         85          60  9.00    102.0        86
## 975   33        120          75 10.00     98.0        70
## 976   48        120          80 11.00     98.0        88
## 977   50        140          95 17.00     98.0        60
## 978   30        140         100 15.00     98.0        70
## 979   29        120          75  7.20    100.0        70
## 980   48        120          80 11.00     98.0        88
## 981   50        140          90 15.00     98.0        77
## 982   25        140         100  7.20     98.0        80
## 983   55        140          80  7.20    101.0        76
## 984   40        140         100 18.00     98.0        77
## 985   28        120          80  9.00    102.0        76
## 986   32        140         100  8.00     98.0        70
## 987   17         90          60 11.00    101.0        78
## 988   17         90          63  8.00    101.0        70
## 989   25        120          90 12.00    101.0        80
## 990   17        120          80  7.00    102.0        76
## 991   19         90          65 11.00    101.0        70
## 992   37        120          90 11.00     98.0        88
## 993   17        110          75 13.00    101.0        76
## 994   25        120          90 15.00     98.0        80
## 995   40        160         100 19.00     98.0        77
## 996   32        140          90 18.00     98.0        88
## 997   12         90          60  8.00    102.0        66
## 998   35        140         100  9.00     98.0        66
## 999   54        140         100 15.00     98.0        66
## 1000  40        120          95 11.00     98.0        80
## 1001  12         90          60 11.00    102.0        60
## 1002  60        120          85 15.00     98.0        60
## 1003  55        140          95 19.00     98.0        77
## 1004  50        130         100 16.00     98.0        76
## 1005  13         90          65  9.00    101.0        80
## 1006  17         90          65  7.70    103.0        67
## 1007  17         85          60  6.30    102.0        86
## 1008  40        120          75  7.70     98.0        70
## 1009  48        120          80 11.00     98.0        88
## 1010  22        120          60 15.00     98.0        80
## 1011  55        120          90 18.00     98.0        60
## 1012  35         85          60 19.00     98.0        86
## 1013  43        120          90 18.00     98.0        70
## 1014  32        120          65  6.00    101.0        76

CORRELATION MATRIX

Correlation matrix adalah tabel yang menunjukkan hubungan atau korelasi antar variabel dari sebuah dataset. Correlation matrix juga digunakan untuk melihat seberapa kuat hubungan antar variabel dan arah hubungan linier antar variabel. Nilai dalam correlation matrix berada pada rentang -1 sampai 1, dimana nilai mendekati -1 menunjukkan hubungan hubungan linier negatif yang kuat, nilai mendekati 0 menunjukkan tidak adanya hubungan linier, dan nilai mendekati 1 menunjukkan hubungan linier positif yang kuat.

correlation_matrix <- cor(data_numeric)
correlation_matrix
##                     Age  SystolicBP DiastolicBP         BS    BodyTemp
## Age          1.00000000  0.41604545  0.39802629  0.4732843 -0.25532314
## SystolicBP   0.41604545  1.00000000  0.78700648  0.4251717 -0.28661552
## DiastolicBP  0.39802629  0.78700648  1.00000000  0.4238241 -0.25753832
## BS           0.47328434  0.42517166  0.42382407  1.0000000 -0.10349336
## BodyTemp    -0.25532314 -0.28661552 -0.25753832 -0.1034934  1.00000000
## HeartRate    0.07979763 -0.02310796 -0.04615057  0.1428672  0.09877104
##               HeartRate
## Age          0.07979763
## SystolicBP  -0.02310796
## DiastolicBP -0.04615057
## BS           0.14286723
## BodyTemp     0.09877104
## HeartRate    1.00000000
correlation_matrix_plot <- corrplot(correlation_matrix,
                                    method = "color",
                                    type = "upper",
                                    addCoef.col = "black",
                                    tl.col = "black",
                                    tl.srt = 45)

Berdasarkan output correlation matrix diatas dapat dilihat bahwa nilai korelasi terbesar adalah antara DiastolicBP dan SystolicBP yaitu 0.78700648, hal ini menunjukkan Tekanan darah sistolik dan diastolik meningkat bersama secara signifikan. variabel age memiliki nilai korelasi yang sedang dengan variabel SystolicBP (0.41604545), DiastolicBP (0.39802629), dan BS (0.4732843), hal ini menunjukkan bahwa kenaikan usia wanita hamil juga diikuti oleh kenaikan tekanan darah dan kenaikan gula darah.Sementara itu variabel HeartRate memiliki korelasi yang kecil dengan variabel yang lainnya.

VARIANCE COVARIANCE MATRIX

Matriks kovarians (covariance matrix) merupakan matriks simetris yang berisi varians dan kovarians dari beberapa variabel, di mana diagonal utama mewakili varians dan elemen di luar diagonal mewakili kovarians antara variabel yang berbeda.

covariance_matrix <- cov(data_numeric)
covariance_matrix
##                    Age SystolicBP DiastolicBP         BS   BodyTemp HeartRate
## Age         181.559065 103.171539   74.471739 21.0035619 -4.7180044  8.697168
## SystolicBP  103.171539 338.704005  201.121845 25.7712999 -7.2338429 -3.439938
## DiastolicBP  74.471739 201.121845  192.815323 19.3828770 -4.9042413 -5.183543
## BS           21.003562  25.771300   19.382877 10.8473512 -0.4674483  3.806040
## BodyTemp     -4.718004  -7.233843   -4.904241 -0.4674483  1.8806951  1.095640
## HeartRate     8.697168  -3.439938   -5.183543  3.8060397  1.0956395 65.427104
covariance_matrix_plot <- corrplot(covariance_matrix,
                                   method = "color",
                                   type = "upper",
                                   is.corr = FALSE,
                                   tl.col = "black",
                                   tl.srt = 45,
                                   addCoef.col = "black",
                                   number.cex = 0.7)

Berdasarkan output variance covariance matrix dapat dilihat bahwa variabel systolicBP memiliki nilai variance yang paling tinggi yaitu sebesar 338.704005, hal ini menunjukkan penyebaran nilai tekanan darah yang cukup tinggi, begitu juga dengan nilai variance dari variabel diastolicBP yang juga cukup besar yaitu 192.815323. Nilai covariance positif antara variabel systolicBP dan BS menunjukkan bahwa kadar gula darah mengalami peningkatan seiring dengan peningkatan tekanan darah. Nilai covariance negatif antara variabel diastolicBP dan bodytemp menunjukkan bahwa ketika tekanan darah diastolik meningkat, suhu tubuh cenderung sedikit menurun, dan sebaliknya.

EIGEN VALUES AND EIGEN VECTOR

Eigen values (nilai eigen) merepresentasikan besar variasi data yang dapat dijelaskan oleh setiap komponen, sedangkan eigen vector merepresentasikan arah kombinasi variabel yang membentuk komponen. Tanda minus pada eigen vector menunjukkan arah variabel yang berlawanan dengan arah komponen.

eigen <- eigen(covariance_matrix)
eigen_values <- eigen$values
eigen_values
## [1] 529.521825 136.772898  64.572037  51.358769   7.360073   1.647943

Berdasarkan output eigen values diatas dapat dilihat bahwa eigen value terbesar adalah komponen pertama yaitu sebesar 529.521825, hal ini menunjukkan bahwa komponen pertama menjelaskan variasi data yang paling besar. Sedangkan komponen keenam memiliki eigen value paling kecil sebesar 1.647943, hal ini menunjukkan bahwa komponen keenam menjelaskan variasi data yang sangat kecil.

eigen_vectors <- eigen$vectors
eigen_vectors
##              [,1]         [,2]        [,3]         [,4]        [,5]
## [1,] -0.346411189  0.923900546 -0.13192259  0.042731491  0.08198705
## [2,] -0.764857940 -0.293487053  0.14910706  0.553048994  0.02349903
## [3,] -0.537978589 -0.186074547 -0.12389090 -0.811464330  0.04575582
## [4,] -0.072118241  0.069777475  0.04387199 -0.031191932 -0.99247862
## [5,]  0.018657383 -0.008883756  0.01905652 -0.008215683 -0.04608110
## [6,]  0.004638836  0.143880423  0.97094112 -0.181096759  0.05911889
##              [,6]
## [1,]  0.021345781
## [2,]  0.014469639
## [3,]  0.006196148
## [4,] -0.044928412
## [5,]  0.998508320
## [6,] -0.016098692

Berdasarkan output eigen vector diatas dapat dilihat bahwa setiap komponen eigen vector didominasi oleh variabel yang berbeda beda, pada komponen pertama variabel yang memiliki kontribusi paling besar adalah systolicBP (-0.764857940) hal ini menunjukkan bahwa variasi yang dijelaskan oleh komponen pertama lebih dipengaruhi oleh variabel systolicBP. Lalu untuk komponen kedua lebih dipengaruhi oleh variabel age, komponen ketiga lebih dipengaruhi oleh variabel heartrate, komponen keempat lebih dipengaruhi oleh variabel diastolicBP, komponen kelima lebih dipengaruhi oleh variabel BS, dan komponen keenam lebih dipengaruhi oleh variabel bodytemp.