如何连接向量？ [英] How can I concatenate a vector?

问题描述

我正在尝试生成一个变量，该变量是两个字符的串联，例如从 p30s4， p28s4到 p30s4 p28s4。我尝试过猫和粘贴，如下所示。两者都返回空变量。我在做什么错了？

I'm trying to produce a single variable which is a concatenation of two chars e.g to go from "p30s4" "p28s4" to "p30s4 p28s4". I've tried cat and paste as shown below. Both return empty variables. What am I doing wrong?

> blah = c("p30s4","p28s4")
> blah
[1] "p30s4" "p28s4"

> foo = cat(blah)
p30s4 p28s4
> foo
NULL

> foo = paste(cat(blah))
p30s4 p28s4
> foo
character(0)

推荐答案

尝试使用：

> paste(blah, collapse = "")
[1] "p30s4p28s4"

您想要在它们之间留出空格：

or if you want the space in between:

> paste(blah, collapse = " ")
[1] "p30s4 p28s4"

这篇关于如何连接向量？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！