在 R 中使用 toString 函数 [英] Using toString function in R

问题描述

我有数字对象 a=1,b=2,c=3,d=4.现在当我使用:

I have numeric objects a=1,b=2,c=3,d=4. Now when I use :

toString(c(a,b,c,d))

我明白了:

"1, 2, 3, 4"

作为输出.如何去掉逗号?我想要1234"作为输出.或者有其他方法可以做到这一点?

as the output. How do I get rid of the comma? I want "1234" as the output. Or is there another way to do this?

推荐答案

只需使用 paste 或 paste0:

a <- 1; b <- 2; c <- 3; d <- 4
paste0(a, b, c, d)
# [1] "1234"
paste(a, b, c, d, sep="")
# [1] "1234"

<小时>

你不能直接从 toString 得到结果，即使 toString 在幕后使用了 paste:

---

You cannot get the result directly from toString even though toString uses paste under the hood:

toString.default
# function (x, width = NULL, ...) 
# {
#     string <- paste(x, collapse = ", ")
# --- function continues ---

将该行为与以下内容进行比较:

Compare that behavior with:

paste(c(a, b, c, d), collapse = ", ")
# [1] "1, 2, 3, 4"

由于它是硬编码的，如果你真的想使用toString，你就必须使用sub/gsub 来删除使用 toString 后的,"，但这对我来说似乎效率低下.

Since it is hard-coded, if you really wanted to use toString, you would have to then use sub/gsub to remove the "," after you used toString, but that seems inefficient to me.

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