R help - Jul 2021 - problem for strsplit function

sub( "\\.[^.]*$", "", fname )

On July 7, 2021 6:27:48 PM PDT, Kai Yang via R-help <r-help at
r-project.org> wrote:
> Hello List,
>I have a? one column data frame to store file name with extension. I
>want to create new column to keep file name only without extension.
>I tried to use strsplit("name1.csv", "\\.")[[1]] to do
that, but it
>just retain the first row only and it is a vector.? how can do this for
>all of rows and put it into a new column?
>thank you,
>Kai
>
>
>
>
>	[[alternative HTML version deleted]]
>
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-- 
Sent from my phone. Please excuse my brevity.

> sub( "\\.[^.]*$", "", fname )
fwiw, i almost always use '[.]' in preference to '\\\\\\\\.', as
it
seems to be more likely to get through the various levels of quoting in
different contexts.