Às 13:44 de 05/02/2025, Duncan Murdoch escreveu:
If I have this object:
x <- c("abc\ndef", "", "ghi")
and I write it to a file using `writeLines(x, "test.txt")`, my text
editor sees a 5 line file:
1: abc
2: def
3:
4: ghi
5:
which is what I'd expect: the last line in the editor is empty. If I
use `readLines("test.txt")` on that file, I get the vector
c("abc", "def", "", "ghi")
and all of that is fine.
What I'm looking for is simple code that modifies x to the `readLines()`
output, without actually writing and reading it.
My first attempt doesn't work:
unlist(strsplit(x, "\n"))
because it leaves out the blank line 3. I can fix that with this ugly
code:
lines <- strsplit(x, "\n")
lines[sapply(lines, length) == 0] <- list("")
lines <- unlist(lines)
Surely there's a simpler way to do this? I'd like to use just base
functions, no other packages.
Duncan Murdoch
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Hello,
Use ?textConnection.
The 5th line is left out, just like in your code.
x <- c("abc\ndef", "", "ghi")
x |> textConnection() |> readLines()
# [1] "abc" "def" "" "ghi"
Hope this helps,
Rui Barradas
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R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide https://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
