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
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> 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
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