循环以在R中创建多个矩阵(可能使用粘贴) [英] loop to create several matrix in R (maybe using paste)

问题描述

我想创建27个具有2列和可变行数的矩阵. 我可以这样写27行代码:

I want to create 27 matrix with 2 columns and a variable number of rows. I could just write 27 lines of code, like this:

 x1 = cbind(rep(1,34), rnorm(34))

 x2 = cbind(rep(1,36), rnorm(36))

....

x27 = cbind(rep(1,k), rnorm(k))

但是它必须有更好的方法来做到这一点.我想到了一个循环，像这样:

But it must have a better way to do that. I thought of a loop, something like this:

aux = c(34, 36, ..., k) # auxiliar variable with number of rows for each matrix

for (i in 1:27) paste("x",i, sep="") =  cbind(rep(1,aux[i]), rnorm(aux[i]))

但是，它不起作用.我觉得这是一个简单的任务，但是我没有主意.

However, it doesn't work. I feel like this is a simple task, but I am out of ideas.

有帮助吗?

ps .:我想到了一个数组，但无法使用它.我不知道，列表可以胜任这项工作.

ps.: I thought of an array, but I wasn't able to use it. Maybe a list can do the job, I don't know.

推荐答案

您需要assign:

for (i in 1:27) {
  assign(paste("x",i,sep=""), cbind(rep(1,aux[i]), rnorm(aux[i])))
}

这将在您的全局环境中创建27个矩阵对象.

This will create 27 matrix objects in your global environment.

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