R:添加行索引值作为行名
我有一个矩阵:R:添加行索引值作为行名,r,matrix,R,Matrix,我有一个矩阵: [,1] [,2] [1,] 0 0 [2,] 0 0 [3,] 0 1 [4,] 1 0 [5,] 3 2 [6,] 4 0 [7,] 0 0 [8,] 0 0 [9,] 4 5 [10,] 0 3 我想将行名添加为如下所示的数字: [,1] [,2] 1 0 0 2 0 0 3 0
[,1] [,2]
[1,] 0 0
[2,] 0 0
[3,] 0 1
[4,] 1 0
[5,] 3 2
[6,] 4 0
[7,] 0 0
[8,] 0 0
[9,] 4 5
[10,] 0 3
我想将行名添加为如下所示的数字:
[,1] [,2]
1 0 0
2 0 0
3 0 1
4 1 0
5 3 2
6 4 0
7 0 0
8 0 0
9 4 5
10 0 3
我是手动完成的,但是如果我有太多的行,那么我需要花费太长的时间来完成。是否有其他较短的方法将行索引添加为行名
代码如下:
mat=matrix(c(0,0,0,1,3,4,0,0,4,0,0,0,1,0,2,0,0,0,5,3), ncol=2)
mat
rownames(mat)=c("1","2","3","4","5","6","7","8","9","10")
对于非常大的矩阵,我可以推荐优化的原语:
seq_len()
。给你
rownames(mat) <- seq_len(nrow(mat))
rownames(mat)rownames(mat)@KarolisKoncevičius谢谢:)欢迎:)如果这回答了您的问题,请将其标记为答案。谢谢