问题描述
众所周知，如果R的列维或行维为1，则R尝试将矩阵简化为向量.可以使用drop=F命令来防止尺寸的自动下降.
As we all know, R tries to reduce matrices to vectors if its column- or row-dimension is 1. This automatic dropping of dimensions can be prevented by use of the drop=F command.
但是，我目前正在编写一个大型R包，并且需要在代码中几百次禁用降维功能，因此我将不得不手动查找这些位置并添加drop=F数百次.
However, I am currently writing a large R package and would require to disable dimension dropping on several hundred occasions in my code, so that I would have to manually find these locations and add drop=F many hundred times.
因此，我想知道是否有任何选择或可能性通常禁用R中矩阵的降维?
Therefore, I would like to know if there's any option or possibility to generally disable dimension dropping for matrices in R?
推荐答案
您可以通过重新定义[函数来实现:
You can do it by redefining the [ function:
x <- matrix(1:4,2)
`[` <- function(...) base::`[`(...,drop=FALSE)
x[,1]
[,1]
[1,] 1
[2,] 2
尽管现在您不能在调用drop参数时覆盖它，所以您可能要少用它并在完成后删除它.
You cannot override the drop argument when you call it now though, so you might want to use it sparingly and delete when done.
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