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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