Hi Dimitri, raster Postscript is useless. Root produces vector Postscript. Root and PAW use the same technique to generate Postcript output. This was originally developped by Pierre Juillot from Strasbourg. The difference in size seems to be due to the different buffer sizes used when drawing polylines and fill areas. In the case of a 65000 channels histogram, Root decomposes this into a set of vectors of length 100 instead of generating one single call to Postscript. I was thinking to reimplement the TGraph class (where most of the logic is) to add axis to the TGraph and also change the way the buffers to Postscript are generated. This will not be, however, in the first release of 2.23. Rene Brun On Fri, 24 Sep 1999, Dmitri Litvintsev wrote: > > > Hi All, > > My I suspect that it happens beacuse in contrast to PAW > ROOT generates raster PostScript? > > Dmitri Litvintsev > > > On Thu, 23 Sep 1999, Damir Buskulic wrote: > > > Hi, > > > > We had to produce histograms having a large (65000) number of bins. > > Using "save as .eps" in the file menu of a TCanvas, we noticed that the > > size of the produced postscript file was huge (3MB). This is in contrast > > with the size of the postscript file produced by PAW, which, for the > > same histogram, is 26 kB ! > > Why is there such a difference ? Any way to overcome the problem ? > > > > Cheers > > > > Damir > > -- > > ===================================================================== > > | 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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