通过矩阵列名称提取矩阵列值 [英] Extract matrix column values by matrix column name

问题描述

是否可以从矩阵中按名称获取矩阵列?

Is it possible to get a matrix column by name from a matrix?

我尝试了各种方法，例如myMatrix["test", ]，但似乎没有任何效果.

I tried various approaches such as myMatrix["test", ] but nothing seems to work.

推荐答案

是.但是，如果您想将该列放在逗号后面，请放置测试".

Yes. But place your "test" after the comma if you want the column...

> A <- matrix(sample(1:12,12,T),ncol=4)

> rownames(A) <- letters[1:3]

> colnames(A) <- letters[11:14]
> A[,"l"]
 a  b  c 
 6 10  1 

另请参阅help(Extract)

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