在R中串联矩阵 [英] Concatenating Matrices in R

问题描述

如何连接相同列但行数不同的矩阵?例如我 想要连接一个( dim(a) = 15 7000 )和一个b (dim(b) = 16 7000)，我希望结果是一个31行乘7000列的矩阵.我可以针对不同行和列的矩阵执行此操作吗?假设我要合并一个15行和7000列的矩阵与另一个16行和7500列的矩阵.我可以用它创建一个数据集吗?

How can I concatenate matrices of same columns but different number of rows? For example, I want to concatenate a ( dim(a) = 15 7000 ) and b (dim(b) = 16 7000) and I want the result to be a matrix of 31 rows by 7000 columns. Can I do this for matrices of different rows and columns.? Say I want to combine a matrix of 15 rows and 7000 columns with another of 16 rows and 7500 columns. Can I create one dataset with that?

推荐答案

听起来像您在寻找rbind:

> a<-matrix(nrow=10,ncol=5)
> b<-matrix(nrow=20,ncol=5)
> dim(rbind(a,b))
[1] 30  5

类似地，cbind水平堆叠矩阵.

Similarly, cbind stacks the matrices horizontally.

我不确定您最后一个问题的意思(我可以针对不同行和列的矩阵执行此操作吗?")

I am not entirely sure what you mean by the last question ("Can I do this for matrices of different rows and columns.?")

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