As Rene pointed out, the "col" option is the fastest (7 sec on my
machine versus more than a minute for scatter plot)
Damir
Markus Huening wrote:
>
> Thank you for answering,
>
> but you're right, this is quite a big histogram. I tried the idea, but it
> took almost 1 minute to display this beast (on a Sun Ultra 5).
> That doesn't fit to my needs.
> I want to take a sequence of pictures from a CCD as rawdata. I have to
> inspect the images before storing them to my file. That's the reason why I
> want to avoid downsampling and the time for waiting for the pictures adds
> up...
> Any othert idea?
>
> Greetings
>
> Markus
>
> ======================================================
> Markus Huening
> Desy/FDET
> Notkestrasse 85
> D-22607 Hamburg
> Germany
>
> Tel: ++49 (040)8998-3030
> Fax: ++49 (040)8998-3094
> e-mail: markus.huening@desy.de
>
> On Fri, 17 Nov 2000, Damir Buskulic wrote:
>
> > Hi Markus,
> >
> > I suppose something like (given array is your array of chars) :
> >
> > h = new TH2C("h","Image",640,0.,641.,512,0.,513.);
> > for (int ix=0;ix<640;ix++) {
> > for (iy=0;iy<512;iy++) {
> > h->Fill(ix+0.5,iy+0.5,array[ix][iy]);
> > }
> > }
> > h->Draw("col");
> >
> > Will do the trick. But be aware that it is a quite big 2D histogram. You
> > should probably work with smaller ones.
> >
> > Cheers
> >
> > Damir
> >
> > Markus Huening wrote:
> > >
> > > Hi Rooters,
> > >
> > > I'm looking for a way to display an Pixel Image, preferably in a Pad with
> > > Axes an stuff. The Data I want to display is stored in an array (640X512)
> > > of chars. Does anybody know how top do this?
> > >
> > > Greetings
> > >
> > > M. Huening
> > >
> > > ======================================================
> > > Markus Huening
> > > Desy/FDET
> > > Notkestrasse 85
> > > D-22607 Hamburg
> > > Germany
> > >
> > > Tel: ++49 (040)8998-3030
> > > Fax: ++49 (040)8998-3094
> > > e-mail: markus.huening@desy.de
> >
> > --
> > =====================================================================
> > | Damir Buskulic | Universite de Savoie/LAPP |
> > | | Chemin de Bellevue, B.P. 110 |
> > | Tel : +33 (0)450091600 | F-74941 Annecy-le-Vieux Cedex |
> > | e-mail: buskulic@lapp.in2p3.fr | FRANCE |
> > =====================================================================
> > mailto:buskulic@lapp.in2p3.fr
> >
--
=====================================================================
| Damir Buskulic | Universite de Savoie/LAPP |
| | Chemin de Bellevue, B.P. 110 |
| Tel : +33 (0)450091600 | F-74941 Annecy-le-Vieux Cedex |
| e-mail: buskulic@lapp.in2p3.fr | FRANCE |
=====================================================================
mailto:buskulic@lapp.in2p3.fr
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