如何在R中的粘贴命令中的每个元素之间插入逗号？

发布于 2024-10-07 15:23:43 字数 214 浏览 0 评论 0原文

如何在 R 中的粘贴命令中的每个元素之间插入逗号？

paste ("X",1:5,sep="")

"X1" "X2" "X3" "X4" "X5"

现在我想在每个元素之间插入逗号

Desired Output 

"X1","X2","X3","X4","X5"

感谢您的帮助

原文

How can I insert a comma between each element in paste command in R ?

paste ("X",1:5,sep="")

"X1" "X2" "X3" "X4" "X5"

Now I want to insert a comma between each element

Desired Output 

"X1","X2","X3","X4","X5"

Thanks for your help

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初雪 2024-10-14 15:23:43

我认为下面的两个命令之一应该适合您：

> paste ("X",1:5,sep="", collapse=",")
[1] "X1,X2,X3,X4,X5"
> paste ("'","X",1:5,"'",sep="", collapse=",")
[1] "'X1','X2','X3','X4','X5'"

更新，基于注释：

不需要在向量元素“之间”放置逗号。您可以使用 paste 命令的输出作为 read.table 的 col.names 参数。

lines <-
"0 1 2 3 4
 5 6 7 8 9"

con <- textConnection(lines)
cnames <- paste("X",1:5,sep="")
x <- read.table(con, col.names=cnames)
close(con)
x
#   X1 X2 X3 X4 X5
# 1  0  1  2  3  4
# 2  5  6  7  8  9

I think one of the two commands below should work for you:

> paste ("X",1:5,sep="", collapse=",")
[1] "X1,X2,X3,X4,X5"
> paste ("'","X",1:5,"'",sep="", collapse=",")
[1] "'X1','X2','X3','X4','X5'"

Update, based on comments:

There's no need to put commas "between" the vector elements. You can use the output of your paste command as the col.names arg to read.table.

lines <-
"0 1 2 3 4
 5 6 7 8 9"

con <- textConnection(lines)
cnames <- paste("X",1:5,sep="")
x <- read.table(con, col.names=cnames)
close(con)
x
#   X1 X2 X3 X4 X5
# 1  0  1  2  3  4
# 2  5  6  7  8  9

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