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Groups > comp.graphics.apps.gnuplot > #2894

Re: with image and corners2color

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Vasilis wrote:

> Hi all,
> 
> In my program I am generating a lot of 2D color plots. For the moment I
> was making splots, using the "set pm3d map explicit corners2color c1" to
> map to the lower left corner of the pixel.
> 
> I've tried to convert it to 2d plots using the "with image" but now the
> pixel is centered on the value. So all colors are shifted by half pixel in
> both dimensions.
> 
> Is there a way to use a similar setting as corners2color for the "with
> image" command

Gnuplot does not do any averaging or reassignment of pixel color within
an image.  

If the issue is just a coordinate offset, note that you can control the
origin and scaling (pixels size) of an image using additional keywords
origin=<XX,YY> dx=<DX> dy=<DY> 

Examples:
	http://gnuplot.sourceforge.net/demo_cvs/image.html 
	http://gnuplot.sourceforge.net/demo_cvs/barchart_art.html

It is also possible that you can simply use the same splot+pm3d
commands you already have and produce a 2D plot by first saying
"set view map".

	Ethan


> 
> Thanks in advance
> Vasilis

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Thread

with image and corners2color Vasilis <vvlachoudis@gmail.com> - 2015-05-06 06:12 -0700
  Re: with image and corners2color Ethan A Merritt <sfeam@users.sourceforge.net> - 2015-05-06 11:28 -0700
    Re: with image and corners2color Vasilis <vvlachoudis@gmail.com> - 2015-05-06 23:44 -0700
      Re: with image and corners2color Ethan A Merritt <sfeam@users.sourceforge.net> - 2015-05-07 15:28 -0700

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