如何在R中堆叠多个矩阵 [英] How to stack multiple matrices in R

问题描述

我有一个矩阵列表，类似于下面的代码获得的列表:

I have a list of matrices, similar to the one obtained by the code below:

a <- matrix(1, ncol=2, nrow=3)
b <- matrix(2, ncol=2, nrow=3)
c <- matrix(3, ncol=2, nrow=3)
d <- list(a, b, c)

我想将它们堆叠起来，以便它们位于一个矩阵中，类似于这一矩阵:

I want to stack them so that they are in one matrix, similar to this one:

e <- rbind(d[[1]], d[[2]], d[[3]])

诀窍是我事先不知道需要连接多少个矩阵.有没有好的方法可以编写将所有矩阵堆叠在列表中的代码?

The trick is that I don't know in advance how many matrices will need to be joined. Is there a good way to write code that will stack all matrices in the list?

推荐答案

经典do.call:

     do.call(rbind,d)

使用data.table软件包的另一种选择:

Another option using data.table package:

library(data.table)
rbindlist(lapply(d,as.data.frame))

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