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From: Olaf Schultz <o.schultz@enhydralutris.de>
Newsgroups: comp.graphics.apps.gnuplot
Subject: Re: Question about sprintf
Date: Sun, 20 May 2012 21:28:00 +0200
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sfeam wrote:
> Olaf Schultz wrote:
> 
>> Moin moin,
>>
>> I'am currently using 4.4 pl0 and want to do something like
>>
>> plot "foo.dat" u 4:5, "" u 4:5:(sprintf("%8s:%5s",$6,$7)) w labels
>>
>> where $6 and $7 are string-data, no numerical data. But with  %s,
>> known from fprint in awk, it does not work. The man-page for sprintf
>> didn't helped...
> 
> $6 is shorthand for column(6), which returns a numeric value.
> The equivalent for string data is stringcolumn(6), for which
> the shorthand is strcol(6)

Thanks, that works

"" u 4:5:(sprintf("%s_%s",strcol(6),strcol(7)))

does exact that, what I want.

Greetings,

Olaf

PS: It's every time a big fun to infect to Excel-bounded colleques with
the gnuplot-virus:-)