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I was curious about:
> strsplit("ty,rr", split = ",")
[[1]]
[1] "ty" "rr"
> strsplit("ty|rr", split = "|")
[[1]]
[1] "t" "y" "|" "r" "r"
Why don’t I get c("ty","rr") from strsplit("ty|rr", split="|")?
It’s because the
splitargument is interpreted as a regular expression, and|is a special character in a regex.To get round this, you have two options:
Option 1: Escape the
|, i.e.split = "\\|"Option 2: Specify
fixed = TRUE:Please also note the See Also section of
?strsplit, which tells you to read?"regular expression"for details of the pattern specification.