On Fri, Jul 22, 2011 at 10:02 AM, peter dalgaard <pda...@gmail.com> wrote:
> > On Jul 22, 2011, at 09:04 , Rainer M Krug wrote: > > > On Fri, Jul 22, 2011 at 12:44 AM, Duncan Murdoch > > <murdoch.dun...@gmail.com>wrote: > > > >> On 11-07-21 5:17 PM, pilchat wrote: > >> > >>> thank you guys for your reply. > >>> > >>> i was sure that it was related to changes in the generation of ps > >>> files with the latest R release. > >>> > >>> now the question is: how can i restore the old behavior in R2.13? > >>> > >> > >> Peter told you. > >> > > > > True - but editing each file ps won't be an option when creating many ps > > files. > > > > That's not what Peter said. > Sincere apologies from Rainer to Peter. > > > A true solution would be to include an optional argument into > postscript(), > > e.g. sRGB=TRUE, which uses the old implementation if sRGB==FALSE. > Otherwise, > > I do not think there is an *easy* solution, as postscript calls compiled > > code to do the actual work. > > > The .ps.prolog is not in C code but in an R character vector. > Rainer should really read the posts properly before replying .... > > > > > Cheers, > > > > Rainer > > > >> > >> Duncan Murdoch > >> > >> > >> > >>> thanks > >>> > >>> gaetano > >>> > >>> On 7/21/11, Ted Harding<ted.harding@wlandres.**net< > ted.hard...@wlandres.net>> > >>> wrote: > >>> > >>>> Yes, Peter, your suggestion does the trick (at any rate with > >>>> Gaetano's files). > >>>> > >>>> I edited his volc2.13.eps (the slow one) as follows (the original > >>>> commented out with "%%##") making just the following change: > >>>> > >>>> %%## /setrgb { srgb setcolor } def > >>>> /setrgb { setrgbcolor } def > >>>> %%## End of editing > >>>> > >>>> (at line 53 of the prologue). The result is a file that produces > >>>> exactly the same picture as the other (fast) one, and renders > >>>> (to within my perceptual resolution) in exactly the same time, > >>>> i.e. just under one second (as opposed to about 18 before). > >>>> > >>>> Thanks, Peter! > >>>> Ted. > >>>> > >>>> On 21-Jul-11 18:59:58, peter dalgaard wrote: > >>>> > >>>>> This is due to the introduction of sRGB. Since this actually does > >>>>> something (Google for sRGB and you will be approximately as wise as > >>>>> me...), I don't think it is likely to be taken out. You can, however, > >>>>> always edit .ps.prolog. (I would expect that the line > >>>>> > >>>>> /setrgb { setrgbcolor } def > >>>>> > >>>>> instead of what is already there would reinstate the old behavior, > but > >>>>> no guarantees. > >>>>> ) > >>>>> > >>>>> > >>>>> On Jul 21, 2011, at 17:26 , (Ted Harding) wrote: > >>>>> > >>>>> On 21-Jul-11 13:24:32, Duncan Murdoch wrote: > >>>>>> > >>>>>>> On 11-07-21 3:23 AM, pilchat wrote: > >>>>>>> > >>>>>>>> Dear R users, > >>>>>>>> > >>>>>>>> I have a desktop computer and a laptop, both of them > >>>>>>>> with Ubuntu Lucid. The former has R2.10 installed from > >>>>>>>> Ubuntu repositories (this is the most recent version > >>>>>>>> in the repositories), while the latter has R2.13 from > >>>>>>>> the CRAN repositories. > >>>>>>>> > >>>>>>>> I noticed that postscript files generated with R2.10 > >>>>>>>> are "better" than files generated with the latest release > >>>>>>>> of R, in particular for plots with colored areas, such > >>>>>>>> as the output of image or persp. The thing is that my ps > >>>>>>>> viewer (e.g. gv or evince) is very slow in opening ps > >>>>>>>> files from R2.13, while it smoothly displays ps files > >>>>>>>> from R2.10, regardless of "encapsulation". > >>>>>>>> > >>>>>>>> I think this is related to differences in the way the > >>>>>>>> ps file is generated by the two versions of R, but I > >>>>>>>> don't know how to go deeper in the matter. > >>>>>>>> > >>>>>>> > >>>>>>> Postscript files are mostly text, so you can compare the > >>>>>>> two files and> see what the differences are. The NEWS > >>>>>>> file shows a number of changes since 2.10.0, but I can't > >>>>>>> see any that would cause problems for viewers. > >>>>>>> > >>>>>>> Duncan Murdoch > >>>>>>> > >>>>>>> Is there anyone experiencing the same issue? Is there > >>>>>>>> any solution? > >>>>>>>> > >>>>>>>> Thank you in advance > >>>>>>>> > >>>>>>>> Cheers > >>>>>>>> Gaetano > >>>>>>>> > >>>>>>> > >>>>>> Gaetano has now sent me two files, generated (as he posted > >>>>>> just now on R-help) by the same commands: > >>>>>> > >>>>>> setEPS() > >>>>>> postscript (file="volc.eps",width=5,**height=4) > >>>>>> image(volcano) > >>>>>> dev.off() > >>>>>> > >>>>>> on his two machines: > >>>>>> > >>>>>> volc2.10.eps generated using R-2.10 on his desktop > >>>>>> (the EPS file with fast rendering) > >>>>>> > >>>>>> volc2.13.eps generated using R-2.13 on his laptop > >>>>>> (the EPS file with slow rendering) > >>>>>> > >>>>>> I have viewed both files on the same machine, and the > >>>>>> result indeed is that while volc2.10.eps renders very > >>>>>> quickly, volc2.13.eps does render very slowly (painting > >>>>>> in by vertical strips which move jerkily from left > >>>>>> to right). I estimate that 'gv volc2.10.eps' does the > >>>>>> rendering in less than 1 second, while 'gv volc2.13.eps' > >>>>>> takes about 18 seconds. > >>>>>> > >>>>>> Comparing the two files, I think I have found the reason. > >>>>>> > >>>>>> A 'diff' on the two files shows a basic difference in > >>>>>> definitions of a function used in the plotting: > >>>>>> > >>>>>> [A] In file volc2.10.eps (the fast one): > >>>>>> > >>>>>> /rgb { setrgbcolor } def > >>>>>> > >>>>>> [B] In file volc2.13.eps (the slow one): > >>>>>> > >>>>>> /srgb { [ /CIEBasedABC > >>>>>> << /DecodeLMN > >>>>>> [ { dup 0.03928 le > >>>>>> {12.92321 div} > >>>>>> {0.055 add 1.055 div 2.4 exp } > >>>>>> ifelse > >>>>>> } bind dup dup > >>>>>> ] > >>>>>> /MatrixLMN [0.412457 0.212673 0.019334 > >>>>>> 0.357576 0.715152 0.119192 > >>>>>> 0.180437 0.072175 0.950301] > >>>>>> /WhitePoint [0.9505 1.0 1.0890] > >>>>>> > >>>>>>> > >>>>>>>> ] setcolorspace } def > >>>>>> /setrgb { srgb setcolor } def > >>>>>> > >>>>>> > >>>>>> Then [A] volc2.10.eps (the fast one) uses commands like: > >>>>>> > >>>>>> /bg { 1 0 0 rgb } def > >>>>>> > >>>>>> while [B] volc2.13.eps (the slow one) uses commands like: > >>>>>> > >>>>>> /bg { 1 0 0 setrgb } def > >>>>>> > >>>>>> in each case for exactly the same purpose. Thus [B] the > >>>>>> slow one uses repeatedly (1157 times) a function setrgb > >>>>>> which has much higher overheads (see definition above) > >>>>>> than the function rgb used (1156 times) by [A] the fast one. > >>>>>> > >>>>>> So the difference in performance is *definitely* down to > >>>>>> a specific difference in how R-2.13 implements 'postscript()' > >>>>>> compared with R-2.10. > >>>>>> > >>>>>> Hoping this is useful! > >>>>>> Ted. > >>>>>> > >>>>>> ------------------------------**------------------------------** > >>>>>> -------- > >>>>>> E-Mail: (Ted Harding)<ted.harding@wlandres.**net< > ted.hard...@wlandres.net> > >>>>>>> > >>>>>> Fax-to-email: +44 (0)870 094 0861 > >>>>>> Date: 21-Jul-11 Time: 16:26:33 > >>>>>> ------------------------------ XFMail ------------------------------ > >>>>>> > >>>>>> ______________________________**________________ > >>>>>> R-help@r-project.org mailing list > >>>>>> https://stat.ethz.ch/mailman/**listinfo/r-help< > https://stat.ethz.ch/mailman/listinfo/r-help> > >>>>>> PLEASE do read the posting guide > >>>>>> http://www.R-project.org/**posting-guide.html< > http://www.R-project.org/posting-guide.html> > >>>>>> and provide commented, minimal, self-contained, reproducible code. > >>>>>> > >>>>> > >>>>> -- > >>>>> Peter Dalgaard > >>>>> Center for Statistics, Copenhagen Business School > >>>>> Solbjerg Plads 3, 2000 Frederiksberg, Denmark > >>>>> Phone: (+45)38153501 > >>>>> Email: pd....@cbs.dk Priv: pda...@gmail.com > >>>>> > >>>>> > >>>> > ------------------------------**------------------------------**-------- > >>>> E-Mail: (Ted Harding)<ted.harding@wlandres.**net< > ted.hard...@wlandres.net> > >>>>> > >>>> Fax-to-email: +44 (0)870 094 0861 > >>>> Date: 21-Jul-11 Time: 21:13:21 > >>>> ------------------------------ XFMail ------------------------------ > >>>> > >>>> > >>> ______________________________**________________ > >>> R-help@r-project.org mailing list > >>> https://stat.ethz.ch/mailman/**listinfo/r-help< > https://stat.ethz.ch/mailman/listinfo/r-help> > >>> PLEASE do read the posting guide http://www.R-project.org/** > >>> posting-guide.html <http://www.R-project.org/posting-guide.html> > >>> and provide commented, minimal, self-contained, reproducible code. > >>> > >> > >> ______________________________**________________ > >> R-help@r-project.org mailing list > >> https://stat.ethz.ch/mailman/**listinfo/r-help< > https://stat.ethz.ch/mailman/listinfo/r-help> > >> PLEASE do read the posting guide http://www.R-project.org/** > >> posting-guide.html <http://www.R-project.org/posting-guide.html> > >> and provide commented, minimal, self-contained, reproducible code. > >> > > > > > > > > -- > > Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation > Biology, > > UCT), Dipl. Phys. (Germany) > > > > Centre of Excellence for Invasion Biology > > Stellenbosch University > > South Africa > > > > Tel : +33 - (0)9 53 10 27 44 > > Cell: +33 - (0)6 85 62 59 98 > > Fax (F): +33 - (0)9 58 10 27 44 > > > > Fax (D): +49 - (0)3 21 21 25 22 44 > > > > email: rai...@krugs.de > > > > Skype: RMkrug > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > > and provide commented, minimal, self-contained, reproducible code. > > -- > Peter Dalgaard > Center for Statistics, Copenhagen Business School > Solbjerg Plads 3, 2000 Frederiksberg, Denmark > Phone: (+45)38153501 > Email: pd....@cbs.dk Priv: pda...@gmail.com > > -- Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany) Centre of Excellence for Invasion Biology Stellenbosch University South Africa Tel : +33 - (0)9 53 10 27 44 Cell: +33 - (0)6 85 62 59 98 Fax (F): +33 - (0)9 58 10 27 44 Fax (D): +49 - (0)3 21 21 25 22 44 email: rai...@krugs.de Skype: RMkrug [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.