#Nama : Sofi Fakidhotul Mutafida
#NIM : 2507016014
#Mata Kuliah: Statistika Komputasi
#1. 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
#2. 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
#3. Mengubah Nilai Data dalam Variabel
simpan = c (10,20,40,15,40)
simpan
## [1] 10 20 40 15 40
simpan[3]=100
simpan[4]=10000
simpan
## [1] 10 20 100 10000 40
#4. 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)]
NILAI
## [1] 40
#5. 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
#6. 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]
## [1] 25 60 60 55
#7. 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
#8. 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
#9. Lebih Lanjut 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[NILAI<75]
NILAI
## [1] 70 25 60 60 55
#10. Lebih Lanjut 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[NILAI>90]
NILAI
## [1] 100 95
#11. Contoh Sederhana Penggunaan dari Bahasa Pemrograman 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
#12. Jenis Data R
#contoh 1 numeric
mode(1000)
## [1] "numeric"
simpan = c (1000)
mode(simpan)
## [1] "numeric"
#contoh 2 character
mode("HALO")
## [1] "character"
simpan = c ("HALO")
mode(simpan)
## [1] "character"
#contoh 3 logical
d = c(F)
d
## [1] FALSE
a = c(T)
a
## [1] TRUE
mode(d)
## [1] "logical"
mode(a)
## [1] "logical"
#Contoh kode program R pembuatan fungsi kuadrat
kuadrat=function(x)
{
print(x*x);
}
A = c(4)
kuadrat(A)
## [1] 16
mode(kuadrat)
## [1] "function"
#13. Operator Penjumlahan +, Pengurangan -, Perkalian *, Pembagian /, Pangkat ^, Sisa %%
A = c(1, 2, 3)
B = c(4, 5, 6)
C = A+B
C
## [1] 5 7 9
A = c(1, 2, 3)
B = 2+A
B
## [1] 3 4 5
A = c(2, 4, 6)
B = c(1, 3, 5)
B-A
## [1] -1 -1 -1
A = c(4, 8, 12)
A*0.5
## [1] 2 4 6
A = c(4, 8, 12)
B = c(2, 2, 2)
A/B
## [1] 2 4 6
A = c(3, 6, 1)
B = c(2, 2, 0)
A^B
## [1] 9 36 1
A = c(5, 2, 7)
B = c(3, 2, 6)
C = A%%B
C
## [1] 2 0 1
#14. Fungsi length
A = c(100,70,80,55,80,70,80)
length(A)
## [1] 7
#15. Fungsi sort
A = c(70,80,50,25,100,60)
sort(A)
## [1] 25 50 60 70 80 100
#16. Fungsi diff
A = c(100,50,70,80,60)
diff(A)
## [1] -50 20 10 -20
#17. Fungsi sum
A = c(50,60,70,80)
sum(A)
## [1] 260
#18. Fungsi sqrt
a = sqrt(81)
a
## [1] 9
b = sqrt(a)
b
## [1] 3
#19. Fungsi max dan min
A = c(10,25,90,75,95,57)
max(A) #nilai maksimum dari data
## [1] 95
min(A) #nilai minimum dari data
## [1] 10
#20. Fungsi exp
exp(1)
## [1] 2.718282
exp(2)
## [1] 7.389056
#21. Fungsi pi atau 𝝅
pi
## [1] 3.141593
#22. Fungsi options
options(digits=3)
pi
## [1] 3.14
options(digits=10)
pi
## [1] 3.141592654
#23. 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
#contoh jika ingin ditampilkan nilai-nilai kelipatan 3, dimulai dari angka 2 sampai 30
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
#cara lain
seq(2, 30, 3)
## [1] 2 5 8 11 14 17 20 23 26 29
#21. 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
#Contoh lain misalkan suatu survey yang dilakukan terhadap 10 orang sebagai sampel untuk melihat apakah seseorang tersebut terkena insomnia (ya) atau tidak (tidak).
hasil = c("ya", "tidak", "ya", "ya", "ya", "ya", "tidak", "ya", "tidak", "ya")
table(hasil)
## hasil
## tidak ya
## 3 7
table(hasil)/length(hasil)
## hasil
## tidak ya
## 0.3 0.7
#22. Fungsi factor
A = c("ikan", "ikan", "udang", "ikan", "udang", "ikan", "ikan", "udang")
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
#23. Fungsi barplot
A = c(10, 10, 10, 10, 20, 20, 30, 30, 30, 30, 30, 30)
barplot(table(A))
barplot(table(A)/length(A))
#24. 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)
#alternatif lain untuk menyajikan data
A=c(10,10,10,10,10,20,20,20,30,30,40)
plot(table(A))
