Re: [Gnuplot-info] Colorbox position and size

[theozh <th...@gm...>]

set rmargin manually in screen coordinates such that you get a squared
graph. For this, it might be convenient to define variables "PlotWidth"
and "PlotHeight".
In the code below I added a "control" graph in the wxt terminal. Skip
the lines if you don't need it.


Apart from this: a question from my side to the gnuplot-experts:
If I leave out the decimal points in the definition for PlotWidth and
PlotHeight, I will get an empty graph because the (integer) division is
obviously zero and as a consequence rmargin is set at screen 0. If I
anyway load the same gnuplot code a second time, gnuplot crashes/ends
immediately. Is this a bug or a feature?


################### gnuplot example #####################
reset

set terminal png size PlotWidth,PlotHeight font "Arial,10"
set output 'out.png'

PlotWidth=318.  # decimal point to avoid integer division
PlotHeight=256. # see above

set lmargin 0
set rmargin at screen (PlotHeight/PlotWidth)
set tmargin 0
set bmargin 0

set colorbox user size 0.05,0.8 origin 0.85,0.1

plot[0:1][0:1] '-' u 1:2:3 with image
0 0 0
0 1 1
1 0 2
1 1 3
e

set output
set term wxt size PlotWidth,PlotHeight
replot

################# end of example ######################