Tugas 1 Statistika Komputasi

#Nama: Vania Dewi Rusyanti
#Nim: 2507016023
#Kelas Statistika B

## Menyimpan Data dalam Variabel (Fungsi c)
simpan = c(10, 20, 40, 15, 40)
simpan

## [1] 10 20 40 15 40

simpan = c(1000, 2000, 3000, 4000, 5000)
simpan

## [1] 1000 2000 3000 4000 5000

## Mengakses Nilai Data dalam Variabel secara Individual
simpan = c(10, 20, 40, 15, 40)
simpan[3]

## [1] 40

simpan[4]

## [1] 15

simpan[c(1,3,4)]

## [1] 10 40 15

simpan[2:4]

## [1] 20 40 15

## Mengubah Nilai Data dalam variabel
simpan = c(10, 20, 40, 15, 40)
simpan

## [1] 10 20 40 15 40

simpan[3] = 100
simpan[4] = 1000
simpan

## [1]   10   20  100 1000   40

## Menghapus Nilai Data dalam Variabel 
NILAI = c(10, 40, 45, 30, 80)
NILAI

## [1] 10 40 45 30 80

NILAI = NILAI[-3]
NILAI

## [1] 10 40 30 80

NILAI = NILAI[-4]
NILAI

## [1] 10 40 30

NILAI = NILAI[c(-1, -3)] # DIBETULKAN: Dihapus kurung buka ekstra
NILAI

## [1] 40

## Penggunaan Operator > (Lebih Besar Dari)
NILAI = c(100, 95, 70, 80, 25, 60, 80, 60, 55, 90) 
NILAI

##  [1] 100  95  70  80  25  60  80  60  55  90

NILAI[NILAI > 80]

## [1] 100  95  90

NILAI = NILAI[NILAI > 90] 

## Penggunaan Operator < (Lebih Kecil Dari)
NILAI = c(100, 95, 70, 80, 25, 60, 80, 60, 55, 90) 
NILAI

##  [1] 100  95  70  80  25  60  80  60  55  90

NILAI[NILAI == 70] # DIBETULKAN: Menggunakan == untuk perbandingan

## [1] 70

NILAI[NILAI > 60 & NILAI < 80]

## [1] 70

## Penggunaan Operator & (Dan)
NILAI = c(100, 95, 70, 80, 25, 60, 80, 60, 55, 90) 
NILAI

##  [1] 100  95  70  80  25  60  80  60  55  90

NILAI[NILAI > 60 & NILAI < 80]

## [1] 70

## Penggunaan Operator | (Atau) 
NILAI = c(100, 95, 70, 80, 25, 60, 80, 60, 55, 90) 
NILAI

##  [1] 100  95  70  80  25  60  80  60  55  90

NILAI[NILAI > 80 | NILAI < 30]

## [1] 100  95  25  90

## Contoh sederhana penggunaan R 
fungsi = function(x)
{
  for(i in 1:length(x))
  {
    if(x[i] < 65)
    {
      x[i] = x[i] + 10;
    }
    print(x[i])
  }
}
A = c(100, 95, 70, 80, 25, 60, 80, 60, 55, 90) 
fungsi(A)

## [1] 100
## [1] 95
## [1] 70
## [1] 80
## [1] 35
## [1] 70
## [1] 80
## [1] 70
## [1] 65
## [1] 90

## Jenis Data R
# Numeric
mode(1000)

## [1] "numeric"

simpan = c(1000)
mode(simpan)

## [1] "numeric"

# Karakter
mode("HALO")

## [1] "character"

simpan = c("HALO")
mode(simpan)

## [1] "character"

# Logika
d = c(FALSE)
d

## [1] FALSE

a = c(TRUE)
a

## [1] TRUE

mode(d)

## [1] "logical"

mode(a)

## [1] "logical"

# Fungsi
kuadrat = function(x) # DIBETULKAN: Ejaan 'function' dan formula kuadrat
{
  print(x^2)
}
A = c(4)
kuadrat(A)

## [1] 16

mode(kuadrat)

## [1] "function"

## Operator Penjumlahan (+), Pengurangan (-), Perkalian (*), Pembagian (/), Pangkat (^), Sisa (%%) 
# Penjumlahan (+)
A = c(1,2,3)
B = c(4,5,6)
C = A + B
C

## [1] 5 7 9

# Penjumlahan (+)
A = c(1,2,3)
B = 2 + A
B

## [1] 3 4 5

# Pengurangan (-)
A = c(2,4,6)
B = c(1,3,5)
B - A

## [1] -1 -1 -1

# Perkalian (*)
A = c(4,8,12)
A * 0.5

## [1] 2 4 6

# Pembagian (/)
A = c(4,8,12)
B = c(2,2,2)
A / B

## [1] 2 4 6

# Pangkat (^)
A = c(3,6,1)
B = c(2,2,0)
A^B

## [1]  9 36  1

# Sisa (%%) 
A = c(5,2,7)
B = c(3,2,6)
C = A %% B
C

## [1] 2 0 1

## Fungsi length
A = c(100,70,80,55,80,70,80) 
length(A)

## [1] 7

## Fungsi sort
A = c(70,80,50,25,100,60) 
sort(A)

## [1]  25  50  60  70  80 100

## Fungsi diff 
A = c(100,50,70,80,60) 
diff(A)

## [1] -50  20  10 -20

## Fungsi sum
A = c(50,60,70,80) 
sum(A)

## [1] 260

## Fungsi sqrt
a = sqrt(81)
a

## [1] 9

b = sqrt(a)
b

## [1] 3

## Fungsi max dan min 
A = c(10,25,90,75,95,57)
max(A)

## [1] 95

min(A)

## [1] 10

## Fungsi exp 
# DIBETULKAN: Hapus penetapan variabel 'exp=2,718...' karena merusak fungsi exp() bawaan R
exp(1)

## [1] 2.718282

exp(2)

## [1] 7.389056

## Fungsi pi atau π 
pi

## [1] 3.141593

## Fungsi options 
options(digits=3) 
pi

## [1] 3.14

options(digits=10) 
pi

## [1] 3.141592654

## Fungsi seq
seq(from=1, to=10)

##  [1]  1  2  3  4  5  6  7  8  9 10

seq(from=2, by=0.5, length.out=4)

## [1] 2.0 2.5 3.0 3.5

panggil = function(x,y,z)
{
  a = x;
  print(a);
  for(i in x : z)
  {
    a = a + y;
    if(a > z)
    {
      break;
    }
    print(a);
  }
}
panggil(2,3,30)

## [1] 2
## [1] 5
## [1] 8
## [1] 11
## [1] 14
## [1] 17
## [1] 20
## [1] 23
## [1] 26
## [1] 29

seq(2, 30, 3)

##  [1]  2  5  8 11 14 17 20 23 26 29

## Fungsi table 
A = c(10, 10, 30, 10, 30, 10, 10, 40, 40, 70, 90, 70, 80, 60, 60, 90) 
table(A)

## A
## 10 30 40 60 70 80 90 
##  5  2  2  2  2  1  2

table(A)/length(A)

## A
##     10     30     40     60     70     80     90 
## 0.3125 0.1250 0.1250 0.1250 0.1250 0.0625 0.1250

hasil = c("ya", "tidak", "ya", "ya", "ya", "ya", "tidak", "ya", "tidak", "ya") # DIBETULKAN: Tanda petik lurus
table(hasil)

## hasil
## tidak    ya 
##     3     7

table(hasil)/length(hasil)

## hasil
## tidak    ya 
##   0.3   0.7

## Fungsi factor 
A = c("ikan", "ikan", "udang", "ikan", "udang", "ikan", "ikan", "udang") # DIBETULKAN: Tanda petik & spasi ekstra
factor(A)

## [1] ikan  ikan  udang ikan  udang ikan  ikan  udang
## Levels: ikan udang

A = c("sarjana", "diploma", "sarjana", "pengangguran", "sarjana", "diploma", "diploma", "pengangguran") 
factor(A)

## [1] sarjana      diploma      sarjana      pengangguran sarjana     
## [6] diploma      diploma      pengangguran
## Levels: diploma pengangguran sarjana

## Fungsi barplot
A = c(10, 10, 10, 10, 20, 20, 30, 30, 30, 30, 30, 30) 
barplot(table(A))

barplot(table(A)/length(A))

## Fungsi plot
A = c(10,10,10,10,10,20,20,20,30,30,40) 
table(A)

## A
## 10 20 30 40 
##  5  3  2  1

nilai = c(10,20,30,40) 
frekuensi = c(5,3,2,1) 
plot(nilai,frekuensi)

A = c(10,10,10,10,10,20,20,20,30,30,40) 
plot(table(A))

Tugas 1 Statistika Komputasi

Vania Dewi Rusyanti

2026-08-16