paste() 和 paste0() 的区别 [英] Difference between paste() and paste0()

问题描述

R 的新手，谁能解释一下 paste() 和 paste0() 之间的区别，我从一些帖子中了解到

Being new to R, can someone please explain the difference between paste() and paste0(), what I had understood from some post is that

paste0("a", "b") === paste("a", "b", sep="")

我也尝试过这样的事情

a <- c("a","b","c")
b <- c("y","w","q")
paste(a,b,sep = "_")
**output**
"a_y" "b_w" "c_q"

使用 paste0()

a <- c("a","b","c")
b <- c("y","w","q")
paste0(a,b,sep = "_")
**output**
"ay_" "bw_" "cq_"

难道只是paste()在元素之间使用分隔符而paste0()在元素之后使用分隔符?

Is it just that paste() uses separator between elements and paste0() uses separator after the elements?

推荐答案

如解释 在 Tyler Rinker 的这篇博客中:

paste 有 3 个参数.

paste (..., sep = " ", collapse = NULL) ... 是你的东西想要粘贴在一起，sep 和崩溃是得到它的人完毕.我粘贴了三个基本的东西:

paste (..., sep = " ", collapse = NULL) The ... is the stuff you want to paste together and sep and collapse are the guys to get it done. There are three basic things I paste together:

• 一堆单独的字符串.
• 为元素粘贴了 2 个或更多字符串.
• 一根绳子混在一起.

这里有一个例子，虽然没有正确的参数

Here's an example of each, though not with the correct arguments

paste("A", 1, "%") #一堆单独的字符串.

paste("A", 1, "%") #A bunch of individual character strings.

paste(1:4, letters[1:4]) #2 个或更多字符串粘贴元素元素.

paste(1:4, letters[1:4]) #2 or more strings pasted element for element.

paste(1:10) #一个字符串混在一起.这是每个的 sep/collapse 规则:

paste(1:10) #One string smushed together. Here's the sep/collapse rule for each:

• 一堆单独的字符串——你想要 sep
• 2 个或更多字符串为元素粘贴元素.– 你想要 sep
• 一根绳子混在一起.- Smushin 需要折叠

paste0 的缩写:paste(x, sep="") 所以它让我们更懒并且更有效率.

paste0 is short for: paste(x, sep="") So it allows us to be lazier and more efficient.

paste0("a", "b") == paste("a", "b", sep="") ## [1] TRUE

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