Dear all,
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.
*** DESCRIPTION AND REPRODUCIBLE EXAMPLE ***
- 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 get 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.
*** GNUPLOT VERSION ***
gnuplot> show version long
G N U P L O T
Version 4.2 patchlevel 6
last modified Sep 2009
System: Linux 2.6.18-164.6.1.el5
Compile options:
-READLINE +LIBREADLINE +HISTORY +BACKWARDS_COMPATIBILITY +BINARY_DATA
-LIBGD
-NOCWDRC +X11 +X11_POLYGON +MULTIBYTE +USE_MOUSE +HIDDEN3D_QUADTREE
+DATASTRINGS +HISTOGRAMS +OBJECTS +STRINGVARS +MACROS +IMAGE
DRIVER_DIR = "/usr/local/libexec/gnuplot/4.2"
GNUPLOT_PS_DIR = "/usr/local/share/gnuplot/4.2/PostScript"
HELPFILE = "/usr/local/share/gnuplot/4.2/gnuplot.gih"
*** ***
Thank you for your help.
Adhemar
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