contour plot bug when specifying line styles and colors?
Ekrenor
I am puzzled by a strange behaviour when trying to set the line styles
and colors in the contour-plots.
I'll try to describe it through a reproducible example.
I am using gnuplot 4.2 patchlevel 6.
- SURFACE PLOT and CONTOUR PLOT
set style line 2 lc rgb "black" lw 2 lt 1
set style line 3 lc rgb "orange" lw 2 lt 4
set style increment user
set iso 30
set hidden
set contour both
f(x,y) = exp(-(x**2 + y**2))*cos(x/4)*sin(y)*cos(2*(x**2+y**2))
splot [-2:2][-2:2] f(x,y)
set terminal postscript color enhanced
set output "case_3D.ps"
replot
What do we have here?
- the 3D plot is fine (red and solid line, I did not touch it infact)
- the first color contour is solid, width = 2, but is RED, not BLACK
(despite having indicated lc rgb "black")
- the second color contour is dotted, width = 2, but is PINK, not
ORANGE!
- the key (legend) is surprisingly right, showing a black solid and an
orange dotted sample lines which do not exist in the contour plot
proper...
I am confused here... it seems that if I specify the line style, that
determines also the color, overriding my specifications.
Any suggestions?
Thank you.
Ekrenor
Matteo
author of gnuplot in action).
Is there any possibility that this will be fixed in a new version?
Or at least, could someone kindly suggest me a workaround enabling me
to specify both color and style of each contour line?
Thank you very much.
E.
sfeam
> It appears that this is a bug, as confirmed also by Mr. Janert (the
> author of gnuplot in action).
>
> Is there any possibility that this will be fixed in a new version?
There is a patchset on Sourceforge that replaces
"set linestyle + set increment user" with a more general mechanism
that allows you to redefine the properties of the individual
line types.
#2004590 mechanism to redefine base linetypes
The development focus has been on getting version 4.4 released
rather than on polishing the various new-feature patches that
have been contributed. Once 4.4 is out, then new stuff like
user-defined linetypes will start being added to the development
version.
> Or at least, could someone kindly suggest me a workaround enabling me
> to specify both color and style of each contour line?
The only fix I know of at the moment is to apply the patchset
mentioned above. I've just confirmed that it works properly
with the linetypes in contour plots.
Ethan
Ekrenor
> mentioned above. I've just confirmed that it works properly
> with the linetypes in contour plots.
Thank you.
E.