Re: [Help-gsl] histogram2d

[Daniel J Farrell]

Hello Jerome,

I don't like the default colour-space with the pm3d. If you're like me  
try this,

set palette model RGB
set palette rgbformulae 30,-13,-23

This is MATLAB's default, 'jet' colour-space.

(example here, 
http://www.boyfarrell.com/learning-curve/gnuplot-blue-green-red-pm3d-colourmap)

Cheers,

Dan.

On 18 Mar 2008, at 15:08, Jerome BENOIT wrote:

> Hello,
>
> thanks for the reply.
>
> Starting from the hint, I get what I want by enter:
>
>
> set pm3d map
> splot 'histogram2d.txt' using (($1+$2)/2.0):(($3+$4)/2.0):5
>
>
> I think that such a hint may be written somewhere in the GSL manual.
>
> Thanks,
> Jerome
>
> Daniel J Farrell wrote:
> > Hello,
> > I use gnuplot to take a surface plot of gsl histogram2d's. I take  
> > the average of the x and y bin position and reduced the histogram  
> > data to (x,y,z) points.
> > Example,
> > (http://www.boyfarrell.com/forums/gsl-histogram-2d-plot.pdf) using  
> > the data file, (http://www.boyfarrell.com/forums/histogram2d.txt).
> > The gnuplot command was,
> > splot 'histogram2d.txt' using (($1+$2)/2.0):(($3+$4)/2.0):5 with  
> > lines
> > If you want to get the 'density' you could try putting isobars  
> > on... type
> > set contour
> > replot
> > gnuplot can now do histogram but I haven't used this feature. It  
> > might just plot normal 1D histogram...
> > Cheers,
> > Dan.
> > On 7 Mar 2008, at 13:06, Jerome BENOIT wrote:
> > > Hello List,
> > >
> > > I am looking for a way to plot an histogram2d as given by GSL:
> > > something as a density plot.
> > >
> > > Thanks in advance,
> > > Jerome
> > >
> > > --
> > > Jerome BENOIT
> > > jgmbenoit_at_mailsnare_dot_net
> > >
> > >
> > > _______________________________________________
> > > Help-gsl mailing list
> > > address@hidden
> > > http://lists.gnu.org/mailman/listinfo/help-gsl
>
> --
> Jerome BENOIT
> jgmbenoit_at_mailsnare_dot_net
>
>
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