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![値を入れる箱
> hako <- 10
> hako
[1] 10
> hako * 2
[1] 20
変数
30](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-30-2048.jpg?cb=1708847546)
![値を入れる箱
> hako <- 10
> hako
[1] 10
> hako * 2
[1] 20
変数
変数に対して
処理(かけ算)
変数に値を入れる
左矢印のイメージ
31](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-31-2048.jpg?cb=1708847546)
![複数の値をまとめる
> array <- c(10,20,30)
> array
[1] 10 20 30
> array * 2
[1] 20 40 60
配列
32](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-32-2048.jpg?cb=1708847546)
![複数の値をまとめる
> array <- c(10,20,30)
> array
[1] 10 20 30
> array * 2
[1] 20 40 60
処理は
配列全体に
適用される
配列
３つの値を
配列に格納
33](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-33-2048.jpg?cb=1708847546)
![各要素へのアクセス
> array[1]
[1] 10
> array[2]
[1] 20
> array[3]
[1] 30
配列
34](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-34-2048.jpg?cb=1708847546)
![各要素へのアクセス
> array[1]
[1] 10
> array[2]
[1] 20
> array[3]
[1] 30
配列[番号]で
１個ずつ値を
取り出せる
配列
２個目
3個目
35](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-35-2048.jpg?cb=1708847546)
![２次元の配列
> array2 <- matrix(c(10,20,30,
40,50,60), 2, 3)
> array2
[,1] [,2] [,3]
[1,] 10 30 50
[2,] 20 40 60
行列
36](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-36-2048.jpg?cb=1708847546)
![２次元の配列
> array2 <- matrix(c(10,20,30,
40,50,60), 2, 3)
> array2
[,1] [,2] [,3]
[1,] 10 30 50
[2,] 20 40 60
matrixという
関数を...](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-37-2048.jpg?cb=1708847546)
![各要素の指定
> array2[1,1]
[1] 10
> array2[1,]
[1] 10 30 50
> array2[,1]
[1] 10 20
行列
39](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-39-2048.jpg?cb=1708847546)
![各要素の指定
> array2[1,1]
[1] 10
> array2[1,]
[1] 10 30 50
> array2[,1]
[1] 10 20
1行1列を
指定
行列
1行目全体
を指定
1列目全体
を指定
40](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-40-2048.jpg?cb=1708847546)
![要素の指定
> x$HEIGHT
[1] 158 162 177 173 166
> x$HEIGHT[1]
[1] 158
> x$HEIGHT[1:3]
[1] 158 162 177
$で
身長(HEIGHT)
を全指定
データフレーム
...](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-43-2048.jpg?cb=1708847546)
![合計を求める関数
> array
[1] 10 20 30
> sum(array)
[1] 60
48](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-48-2048.jpg?cb=1708847546)
![合計を求める関数
> array
[1] 10 20 30
> sum(array)
[1] 60
処理結果が
出力される
関数名(引数)
で処理呼び出し
先ほどの配列
49](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-49-2048.jpg?cb=1708847546)
![行列も足せる
> array2
[,1] [,2] [,3]
[1,] 10 30 50
[2,] 20 40 60
> sum(array2)
[1] 210
関数
50](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-50-2048.jpg?cb=1708847546)
![行列も足せる
> array2
[,1] [,2] [,3]
[1,] 10 30 50
[2,] 20 40 60
> sum(array2)
[1] 210
合計値が
表示される
関数
先ほどの行列
array2
51](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-51-2048.jpg?cb=1708847546)
![結果を格納関数
> ret <- sum(array2)
> ret
[1] 210
変数
52](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-52-2048.jpg?cb=1708847546)
![結果を格納関数
> ret <- sum(array2)
> ret
[1] 210
処理結果を
変数に格納
変数
合計値の
確認
53](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-53-2048.jpg?cb=1708847546)
![自分で関数を作る自作関数
> varp <- function(x) {
retsult <- var(x) * (length(x) - 1) / length(x)
retsult
}
> varp(array)
[1] 66.66667
...](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-60-2048.jpg?cb=1708847546)
![自分で関数を作る自作関数
> varp <- function(x) {
retsult <- var(x) * (length(x) - 1) / length(x)
retsult
}
> varp(array)
[1] 66.66667
...](https://image.slidesharecdn.com/10rver2-151010062203-lva1-app6891/75/10-r-ver2-15-15-1010-61-2048.jpg?cb=1708847546)
