I have a comma-separated data file in which trailing commas sometimes occur.
I am using strsplit to extract the data from this file, and it seems great
except in cases with trailing comma characters.
The example below illustrates. What I'd like is to get a fourth element in
the answer, being an empty string just like the second element. Is there a
way I can express my patter (or perhaps specify perl or extended) to get
that?
> strsplit("a,,b,", ",")[[1]]
[1] "a" "" "b"
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