Groups > comp.graphics.apps.gnuplot > #1559

Image or special files do not work on y2 axis?

Path	csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From	Ingo Thies <ingo.thies@gmx.de>
Newsgroups	comp.graphics.apps.gnuplot
Subject	Image or special files do not work on y2 axis?
Date	Sat, 29 Dec 2012 15:06:23 +0100
Lines	29
Message-ID	<ak8bmvFf1e8U1@mid.individual.net> (permalink)
Mime-Version	1.0
Content-Type	text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding	7bit
X-Trace	individual.net YFf/ecsfQP5vGxzd0R9xgA4lbd9rqmnnl0GRfmJSbYVvit+rdh4UY3vKobMAowQ3wX
Cancel-Lock	sha1:l6B+ytj68cxchDi4Hewj1iUnmWg=
User-Agent	Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:17.0) Gecko/17.0 Thunderbird/17.0
Xref	csiph.com comp.graphics.apps.gnuplot:1559

Show key headers only | View raw

Dear all,

I am currently trying to trick a gradient fill below a curve by the 
following method:

f(x)=-x*x+1.
xmin=-1.;xmax=1.
ymin=0.;ymax=1.2
set xrange [xmin:xmax];set cbrange [xmin:xmax]
set y2range [0:1]#dummy yrange
#set palette defined ( 0 "blue", 3 "green", 6 "yellow", 10 "red" )
set palette file 'RGB_palettes/rainbow.gpf' u 1:2:3:4; set xrange 
[xmin:xmax];set cbrange [xmin:xmax]
#set yrange [ymin:ymax]#actual yrange using y2 axis
set yrange [0:*]
unset colorbox
unset y2tics; set ytics autofreq
plot '++' using 1:2:1 axes x1y2 with image,\
f(x) axes x1y1 notitle w filledcurves below y1=ymax lc rgb "white",\
f(x) axes x1y1 t 'f(x)' w l lc rgb "#000000"

While this works without problem for the "palette defined ..." method it 
fails for "palette file ...", with an error message "y range is 
invalid". However, if I exchange y1 and y2 axes it works. My guess: 
gnuplot can define file dummy files of the type '++' and similar 
properly only if axes x1y1 is used. Otherwise the palette specification 
fails. Did I found a bug here? Or is there a bug in the script above?

IngO

Back to comp.graphics.apps.gnuplot | Previous | Next — Next in thread | Find similar

Thread

Image or special files do not work on y2 axis? Ingo Thies <ingo.thies@gmx.de> - 2012-12-29 15:06 +0100
  Re: Image or special files do not work on y2 axis? sfeam <sfeam@users.sourceforge.net> - 2012-12-29 14:15 -0800
    Re: Image or special files do not work on y2 axis? Ingo Thies <ingo.thies@gmx.de> - 2012-12-30 11:12 +0100
      Re: Image or special files do not work on y2 axis? sfeam <sfeam@users.sourceforge.net> - 2012-12-31 12:09 -0800
        Re: Image or special files do not work on y2 axis? Ingo Thies <ingo.thies@gmx.de> - 2013-01-01 13:36 +0100

csiph-web