[Gnuplot-info] labels and label_contours.awk

[Manfred S. <man...@gm...>]

Hi,

I tried to plot an overlay contour plot over a pm3d map, with labels. I encountered 2 issues:

1) The cited code example at http://gnuplot.sourceforge.net/scripts/index.html#tricks-here
    does not work, it seems outdated.
    "set term table; set out 'contour.dat' " does not work, this should probably be
    "set table 'contour.dat' ; ...; unset table"

2) Issue in the script "label_countours.awk": When doing
gnuplot <<EOF
    set term png truecolor small size 512,320
    set out "demoplot.png"
    set contour base; set cntrparam levels 15; unset surface
    set table "contour.dat"
    splot x*x+y*y
    unset table
    !awk -f label_contours.awk -v nth=10 textcolor=-1 inclt=1 contour.dat >tmp.gp
    reset; load 'tmp.gp'

    set output
EOF

I get
# demo.sh

gnuplot> plot 'contour.dat' index 0 title '200' w l 0,  '' index 1 title '180' w l 1,   '' index 2 title '160' w l 2,       '' index 3 title '140' w l 3,   '' index 4 title '120' w l 4,   '' index 5 title '100' w l 5,       '' index 6 title '80' w l 6,    '' index 7 title '60' w l 7,    '' index 8 title '40' w l 8,        '' index 9 title '20' w l 9
                                                    ^
         "tmp.gp", line 126: ';' expected


The problem seems, "plot ... w l 0" is illegal, I don't know the initial intent, should this be 
"plot ... with lines linetype 0" ?
I then removed the last character from these statement (i.e. "plot ... w l"), and it seemed to work somehow.



After several attempts, I finally made it, but the whole procedure is really a mess.

But besides this: Thanks a lot for this invaluable plotting program!

Regards,
Manfred