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Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: command from inside gnuplot
Date: Tue, 7 Nov 2023 18:52:17 +0100
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Xref: csiph.com comp.graphics.apps.gnuplot:4551

Am 07.11.2023 um 10:24 schrieb Jörg Buchholz:
> Hi,
> 
> i have a problem to use a system command from inside gnuplot.
> 
> sed -i 's/^\xef\xbb\xbf//' ./process-2023-11-02-13-04-40.csv
> 
> works at the terminal
> 
> 
> system "sed -i 's/^\xef\xbb\xbf//' ./process-2023-11-02-13-04-40.csv"
> and
> system(sprintf("sed -i 's/^\xef\xbb\xbf//' 
> ./process-2023-11-02-13-04-40.csv"))

Unfortunately this suffers from a lack of escaping.  Please note that 
"strings in double quotes" go through some pre-processing in gnuplot, 
including backslash escape substitution done to them before being used. 
So if you want literal backslashes, they have to be escaped. See "help 
quote" for the details.

What that means is that

system "sed -i 's/^\\xef\\xbb\\xbf//' ./process-2023-11-02-13-04-40.csv"

should work better.