r - 如何在R中使用readLines删除空白行？

如果文件中有很多空白行，如何在R中使用readLines删除空白行？

我知道我可以在blank.lines.skip=T中使用read.table删除它，在readLines中怎么样？

另外，如何使用readLines删除最后一个\n？

最佳答案

一个可重现的示例:

  Z <- readLines(textConnection("line1 , stuff, other stuff\nline2 ,junk\nline3, a blank two lines follow\n\n\nline6\n"))
>     Z
[1] "line1 , stuff, other stuff"      "line2 ,junk"                     "line3, a blink two lines follow"
[4] ""                                ""                                "line6"
[7] ""
>     Z1 <- Z[sapply(Z, nchar) > 0] # the zero length lines get removed.
> Z1
[1] "line1 , stuff, other stuff"      "line2 ,junk"                     "line3, a blank two lines follow"
[4] "line6"

@Andrie建议您执行以下操作:

> Z <- scan(textConnection("line1 , stuff, other stuff\nline2 ,junk\nline3, a blink two lines follow\n\n\nline6\n"),
            what="", sep="\n",blank.lines.skip=TRUE)
Read 4 items
>     Z
[1] "line1 , stuff, other stuff"      "line2 ,junk"                     "line3, a blink two lines follow"
[4] "line6"

关于r - 如何在R中使用readLines删除空白行？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/11865747/