Re: [Gnuplot-info] Showing a point at a specific location in a plot?

[Hans-Bernhard B. <HBB...@t-...>]

On 05.07.2013 11:53, Harald Servat wrote:
>     I found the solution in
>
>       http://www.gnuplotting.org/plotting-single-points/

Not to discredit that site, but that's not "the" solution.  It's one of 
several possible solutions, and not necessarily the best one either.

>     plot \
>     'file' using ((strcol(2) eq 'X' && $3 == 1) ? $4 / 1000000: NaN)
> : $0 ti 'Group X (9)' w points, \
>     "<echo '16'" using 1:$0 notitle with points;

I would prefer either of the following

     plot \
     'file' using ((strcol(2) eq 'X' && $3 == 1) ? $4 / 1000000: NaN)
         : $0 ti 'Group X (9)' w points, \
     "-" using 1:$0 notitle with points;
16
E

This would be simpler and more portable ("< " special file support 
doesn't work on traditional Windows builds of gnuplot).

Possibly even better:

     set label "" at 5,5 point pt 2
     plot \
     'file' using ((strcol(2) eq 'X' && $3 == 1) ? $4 / 1000000: NaN)
         : $0 ti 'Group X (9)' w points