如何连接两个字符串? [英] How can two strings be concatenated?

问题描述

如何连接(合并、组合)两个值?例如我有:

How can I concatenate (merge, combine) two values? For example I have:

tmp = cbind("GAD", "AB")
tmp
#      [,1]  [,2]
# [1,] "GAD" "AB"

我的目标是将tmp"中的两个值连接成一个字符串:

My goal is to concatenate the two values in "tmp" to one string:

tmp_new = "GAD,AB"

哪个函数可以为我做这件事?

Which function can do this for me?

推荐答案

paste()

是要走的路.正如之前的海报所指出的，粘贴可以做两件事:

is the way to go. As the previous posters pointed out, paste can do two things:

将值连接成一个字符串"，例如

concatenate values into one "string", e.g.

> paste("Hello", "world", sep=" ")
[1] "Hello world"

其中参数 sep 指定要在要连接的参数之间使用的字符，或折叠字符向量

where the argument sep specifies the character(s) to be used between the arguments to concatenate, or collapse character vectors

> x <- c("Hello", "World")
> x
[1] "Hello" "World"
> paste(x, collapse="--")
[1] "Hello--World"

其中参数 collapse 指定要在要折叠的向量元素之间使用的字符.

where the argument collapse specifies the character(s) to be used between the elements of the vector to be collapsed.

您甚至可以将两者结合起来:

You can even combine both:

> paste(x, "and some more", sep="|-|", collapse="--")
[1] "Hello|-|and some more--World|-|and some more"

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