Groups > comp.graphics.apps.gnuplot > #2896

Re: with image and corners2color

From	Ethan A Merritt <sfeam@users.sourceforge.net>
Newsgroups	comp.graphics.apps.gnuplot
Subject	Re: with image and corners2color
Date	2015-05-07 15:28 -0700
Organization	gnuplot development
Message-ID	<migosv$m47$1@dont-email.me> (permalink)
References	<cea3c52e-78ed-448c-915b-f9bf269fcb88@googlegroups.com> <midmdu$kln$1@dont-email.me> <5a4aaebd-85ab-4dce-bcff-0beee9b03379@googlegroups.com>

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Vasilis wrote:

> Thank you Ethan,
> 
> the file I am using is not an image is a file containing
> x y z1
> x+dx y z2
> ...
> 
> x y+dy z11
> x+dx y+dy z12
> ...
> 
> coordinates as a 3D histogram
> that I was plotting with splot as pm3d map
> Using the plot "with image" it works exactly as before
> however the z-color mapped value now is not starting from
> the x,y (lower-left) coordinate but from x-dx/2,y-dy/2
> so it is centred around x,y

Yes, that is how the image styles are defined.

If you are asking how to reposition the origin of the pixels,
how about

   plot 'file' using ($1 + dx/2) : ($2 + dy/2) : 3 with image

	Ethan

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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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