如何在R中将向量转换为矩阵？
要将向量转换为矩阵，只需使用矩阵函数即可。如果需要，我们还可以定义行数和列数，但是如果向量中的值数不是行数或列数的倍数，则R将引发错误，因为无法为此创建矩阵向量。
在这里，我们将按向量的名称读取它们，以简化操作，但您可以根据需要更改其名称。这些示例中显示了四个不同长度的向量-
示例
s
> Vector1<-1:9
> Vector1
[1] 1 2 3 4 5 6 7 8 9
> Vector1<-as.matrix(Vector1)
> Vector1
[,1]
[1,] 1
[2,] 2
[3,] 3
[4,] 4
[5,] 5
[6,] 6
[7,] 7
[8,] 8
[9,] 9
> Vector1<-matrix(Vector1,nrow=3)
> Vector1
[,1] [,2] [,3]
[1,] 1 4 7
[2,] 2 5 8
[3,] 3 6 9
> Vector2<-c(24,26,14,15,39,18,17,25,17,19,18,23,24,19,27,15)
> Vector2
[1] 24 26 14 15 39 18 17 25 17 19 18 23 24 19 27 15
> Vector2<-as.matrix(Vector2)
> Vector2
[,1]
[1,] 24
[2,] 26
[3,] 14
[4,] 15
[5,] 39
[6,] 18
[7,] 17
[8,] 25
[9,] 17
[10,] 19
[11,] 18
[12,] 23
[13,] 24
[14,] 19
[15,] 27
[16,] 15
> Vector2<-matrix(Vector2,nrow=4,byrow=TRUE)
> Vector2
[,1] [,2] [,3] [,4]
[1,] 24 26 14 15
[2,] 39 18 17 25
[3,] 17 19 18 23
[4,] 24 19 27 15
> Vector3<-sample(1:100,25)
> Vector3
[1] 86 84 32 14 4 78 7 82 71 38 98 87 58 54 46 44 88 65 97 60 31 89 63 91 90
> Vector3<-matrix(Vector3,nrow=5)
> Vector3
[,1] [,2] [,3] [,4] [,5]
[1,] 86 78 98 44 31
[2,] 84 7 87 88 89
[3,] 32 82 58 65 63
[4,] 14 71 54 97 91
[5,] 4 38 46 60 90
> Vector3<-matrix(Vector3,nrow=2)
Warning message:
In matrix(Vector3, nrow = 2) :
data length [25] is not a sub-multiple or multiple of the number of rows [2]
> Vector4<-1:10
> Vector4
[1] 1 2 3 4 5 6 7 8 9 10
> Vector4<-matrix(Vector4,nrow=2)
> Vector4
[,1] [,2] [,3] [,4] [,5]
[1,] 1 3 5 7 9
[2,] 2 4 6 8 10
> Vector4<-matrix(Vector4,ncol=2)
> Vector4
[,1] [,2]
[1,] 1 6
[2,] 2 7
[3,] 3 8
[4,] 4 9
[5,] 5 10