Re: [R] dev.print and X11(canvas = black)
Prof Brian Ripley [EMAIL PROTECTED] wrote: On Mon, 1 Mar 2004 [EMAIL PROTECTED] wrote: In Splus, I often use graphics windows with a black background and white foreground. The S print.graph() function sends the current plot to my printer but with a white background and black foreground. I'd like to S (and S-PLUS) only has a few colour numbers, and you can change their interpretation on the screen graphics devices after plotting. R does plot in colours rather than numbers. be able to do something similar in R, but can't figure out how. I've tried various permutations of dev.copy() and dev.print(), but it seems that the foreground color is fixed when the original plot is drawn, and dev.copy always redraws it with that color. So even though I can get my postscript output with a white background, things that were drawn white on the dark background of my X11 device are still drawn white when dev.copy'd to a postscript device. Since the postscript has a white background, that means the white foreground stuff doesn't show up. Is there a way to handle this? Or do I just have to give up on ever using a dark canvas in X11() if I ever want to print the result? There are many ways to print the result, and re-running the plot commands after switching to a postscript() device is one of the best. This would work for you if you only ever use colour numbers and switch the palette (and par(fg)). Jim Lemon made essentially the same suggestion: run the code that created the plot twice, once with X11 as the active device, and again with postscript as the active device. The trouble with this is that is doesn't handle plots that the user has edited. I have some charts that users add things to interactively, using combinations of locator(), text(), mtext(), and arrows(). There's no nice way to know what a user has done to a plot before he attempts to print it. I know that R is internally maintaining a display list. Is there a way to access that without dropping into C? And what's in it, anyway? Jeff __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] dev.print and X11(canvas = black)
On Tue, 2 Mar 2004, Jeffrey J. Hallman wrote: Jim Lemon made essentially the same suggestion: run the code that created the plot twice, once with X11 as the active device, and again with postscript as the active device. The trouble with this is that is doesn't handle plots that the user has edited. I have some charts that users add things to interactively, using combinations of locator(), text(), mtext(), and arrows(). There's no nice way to know what a user has done to a plot before he attempts to print it. Yes, see the sections on `Graphics hardcopy' in section A.1 of MASS4 for exactly this comment: it is hardly news. You could record what the users do as they do it by using your own versions of these functions. I know that R is internally maintaining a display list. Is there a way to access that without dropping into C? And what's in it, anyway? Not really (recordPlot etc does), and not documented AFAIK (but Paul Murrell will be able to correct me if I am wrong here). However, I am pretty sure that it has the actual plot colours and not the colour numbers in it. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UKFax: +44 1865 272595 __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] dev.print and X11(canvas = black)
Hi Prof Brian Ripley wrote: On Tue, 2 Mar 2004, Jeffrey J. Hallman wrote: Jim Lemon made essentially the same suggestion: run the code that created the plot twice, once with X11 as the active device, and again with postscript as the active device. The trouble with this is that is doesn't handle plots that the user has edited. I have some charts that users add things to interactively, using combinations of locator(), text(), mtext(), and arrows(). There's no nice way to know what a user has done to a plot before he attempts to print it. Yes, see the sections on `Graphics hardcopy' in section A.1 of MASS4 for exactly this comment: it is hardly news. You could record what the users do as they do it by using your own versions of these functions. I know that R is internally maintaining a display list. Is there a way to access that without dropping into C? And what's in it, anyway? Not really (recordPlot etc does), and not documented AFAIK (but Paul Murrell will be able to correct me if I am wrong here). However, I am pretty sure that it has the actual plot colours and not the colour numbers in it. Just to confirm, the current internal display list should be considered a black box; the only user-level access to it is record/replayPlot() and dev.copy/print/control(). Paul p.s. If you really want to know what's in the display list, you should start reading at GEcreateSnapshot in R/src/main/engine.c -- Dr Paul Murrell Department of Statistics The University of Auckland Private Bag 92019 Auckland New Zealand 64 9 3737599 x85392 [EMAIL PROTECTED] http://www.stat.auckland.ac.nz/~paul/ __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] dev.print and X11(canvas = black)
In Splus, I often use graphics windows with a black background and white foreground. The S print.graph() function sends the current plot to my printer but with a white background and black foreground. I'd like to be able to do something similar in R, but can't figure out how. I've tried various permutations of dev.copy() and dev.print(), but it seems that the foreground color is fixed when the original plot is drawn, and dev.copy always redraws it with that color. So even though I can get my postscript output with a white background, things that were drawn white on the dark background of my X11 device are still drawn white when dev.copy'd to a postscript device. Since the postscript has a white background, that means the white foreground stuff doesn't show up. Is there a way to handle this? Or do I just have to give up on ever using a dark canvas in X11() if I ever want to print the result? Please reply directly. Jeff __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] dev.print and X11(canvas = black)
On Mon, 1 Mar 2004 [EMAIL PROTECTED] wrote: In Splus, I often use graphics windows with a black background and white foreground. The S print.graph() function sends the current plot to my printer but with a white background and black foreground. I'd like to S (and S-PLUS) only has a few colour numbers, and you can change their interpretation on the screen graphics devices after plotting. R does plot in colours rather than numbers. be able to do something similar in R, but can't figure out how. I've tried various permutations of dev.copy() and dev.print(), but it seems that the foreground color is fixed when the original plot is drawn, and dev.copy always redraws it with that color. So even though I can get my postscript output with a white background, things that were drawn white on the dark background of my X11 device are still drawn white when dev.copy'd to a postscript device. Since the postscript has a white background, that means the white foreground stuff doesn't show up. Is there a way to handle this? Or do I just have to give up on ever using a dark canvas in X11() if I ever want to print the result? There are many ways to print the result, and re-running the plot commands after switching to a postscript() device is one of the best. This would work for you if you only ever use colour numbers and switch the palette (and par(fg)). Please reply directly. Jeff -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UKFax: +44 1865 272595 __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
