[R] large files produced from image plots?
Hi list, I wonder if anyone has thoughts on making image plots in R [using image() or image.plot(), or filled.contour()]- I've made quite a bit now, but they seem quite large in size when exported to pdf file format (even after compressing with pdftk or ghostscript, which I regularly do). I know that for images, raster graphics output (png, tiff) may be the way to go, but often the ones I make are multi-panel plots with other graphics on them, and are usually included in a LaTeX document (PDFLaTeX does accept png) and require stretching/shrinking (and/or possibly editing with Adobe Illustrator). I have had some luck exporting image plots from Matlab (to postscript or pdf) before in the sense that the files seem smaller and less pixelated. Is this a difference in the way image() plots are produced, or with the way the image is written to the pdf() device (if anyone is familiar with other image-exporting programs...)? The other day I had a 13MB dataset, and probably plotted 3/4 of it! using image() and the compressed pdf output was about 8 MB (it contained other stuff but was an addition of a few KB). I tried filled.contour(), as I understand that it colors polygons to fill contours instead of coloring rectangles at each pixel - and it has saved me before - but this time the contours may have been too sharp as as its compressed pdf came out to be 62 MB... (ouch!). I have not tested this data set with other software programs so it may just have been a difficult data set. Is there a good solution to this (or is it simply not to use a vector-graphics format in these instances), and just for my curiosity, are you aware of any things that other software (data analysis) programs do uder the hood to make their exported images smaller/smoother? Thanks much! Stephen [[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.
Re: [R] large files produced from image plots?
Hi, Have you tried the recent rasterImage() function? HTH, baptiste On Sep 8, 2010, at 7:30 PM, Stephen T. wrote: Hi list, I wonder if anyone has thoughts on making image plots in R [using image() or image.plot(), or filled.contour()]- I've made quite a bit now, but they seem quite large in size when exported to pdf file format (even after compressing with pdftk or ghostscript, which I regularly do). I know that for images, raster graphics output (png, tiff) may be the way to go, but often the ones I make are multi-panel plots with other graphics on them, and are usually included in a LaTeX document (PDFLaTeX does accept png) and require stretching/shrinking (and/or possibly editing with Adobe Illustrator). I have had some luck exporting image plots from Matlab (to postscript or pdf) before in the sense that the files seem smaller and less pixelated. Is this a difference in the way image() plots are produced, or with the way the image is written to the pdf() device (if anyone is familiar with other image-exporting programs...)? The other day I had a 13MB dataset, and probably plotted 3/4 of ! it! using image() and the compressed pdf output was about 8 MB (it contained other stuff but was an addition of a few KB). I tried filled.contour(), as I understand that it colors polygons to fill contours instead of coloring rectangles at each pixel - and it has saved me before - but this time the contours may have been too sharp as as its compressed pdf came out to be 62 MB... (ouch!). I have not tested this data set with other software programs so it may just have been a difficult data set. Is there a good solution to this (or is it simply not to use a vector-graphics format in these instances), and just for my curiosity, are you aware of any things that other software (data analysis) programs do uder the hood to make their exported images smaller/smoother? Thanks much! Stephen [[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. __ 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.
Re: [R] large files produced from image plots?
Hi Baptiste,Thanks for your suggestion. I have to look into this further, but anything I try with rasterImage() gives me this type of error (below is from running the example in the help file). This is with R 2.11.1 on OS X 10.5 - *** caught bus error ***address 0x24, cause 'non-existent physical address' Traceback: 1: rasterImage(image, 100, 300, 150, 350, interpolate = FALSE) Possible actions:1: abort (with core dump, if enabled)2: normal R exit3: exit R without saving workspace4: exit R saving workspace This is not an obvious error, is it? Thanks,Stephen Subject: Re: [R] large files produced from image plots? From: baptiste.aug...@googlemail.com Date: Wed, 8 Sep 2010 19:41:46 +0200 CC: r-help@r-project.org To: obsessiv...@hotmail.com Hi, Have you tried the recent rasterImage() function? HTH, baptiste On Sep 8, 2010, at 7:30 PM, Stephen T. wrote: Hi list, I wonder if anyone has thoughts on making image plots in R [using image() or image.plot(), or filled.contour()]- I've made quite a bit now, but they seem quite large in size when exported to pdf file format (even after compressing with pdftk or ghostscript, which I regularly do). I know that for images, raster graphics output (png, tiff) may be the way to go, but often the ones I make are multi-panel plots with other graphics on them, and are usually included in a LaTeX document (PDFLaTeX does accept png) and require stretching/shrinking (and/or possibly editing with Adobe Illustrator). I have had some luck exporting image plots from Matlab (to postscript or pdf) before in the sense that the files seem smaller and less pixelated. Is this a difference in the way image() plots are produced, or with the way the image is written to the pdf() device (if anyone is familiar with other image-exporting programs...)? The other day I had a 13MB dataset, and probably plotted 3/4 o! f it! using image() and the compressed pdf output was about 8 MB (it contained other stuff but was an addition of a few KB). I tried filled.contour(), as I understand that it colors polygons to fill contours instead of coloring rectangles at each pixel - and it has saved me before - but this time the contours may have been too sharp as as its compressed pdf came out to be 62 MB... (ouch!). I have not tested this data set with other software programs so it may just have been a difficult data set. Is there a good solution to this (or is it simply not to use a vector-graphics format in these instances), and just for my curiosity, are you aware of any things that other software (data analysis) programs do uder the hood to make their exported images smaller/smoother? Thanks much! Stephen [[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. [[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.
Re: [R] large files produced from image plots?
Hi, I get the same crash with x11() with sessionInfo() R version 2.11.1 (2010-05-31) x86_64-apple-darwin9.8.0 locale: [1] en_GB.UTF-8/en_GB.UTF-8/C/C/en_GB.UTF-8/en_GB.UTF-8 attached base packages: [1] grid stats graphics grDevices utils datasets methods [8] base However it works fine with quartz(). Have you tried other devices? pdf() doesn't crash R for me, but the output is incorrect. png() is OK but defeats the purpose here. rasterImage is quite a recent addition, it would probably be appreciated to report any such odd behavior to R-devel. Interestingly (or not), the x11() test does not crash for me using grid.raster instead of rasterImage. Best, baptiste On 8 September 2010 21:47, Stephen T. obsessiv...@hotmail.com wrote: Hi Baptiste, Thanks for your suggestion. I have to look into this further, but anything I try with rasterImage() gives me this type of error (below is from running the example in the help file). This is with R 2.11.1 on OS X 10.5 - *** caught bus error *** address 0x24, cause 'non-existent physical address' Traceback: 1: rasterImage(image, 100, 300, 150, 350, interpolate = FALSE) Possible actions: 1: abort (with core dump, if enabled) 2: normal R exit 3: exit R without saving workspace 4: exit R saving workspace This is not an obvious error, is it? Thanks, Stephen Subject: Re: [R] large files produced from image plots? From: baptiste.aug...@googlemail.com Date: Wed, 8 Sep 2010 19:41:46 +0200 CC: r-help@r-project.org To: obsessiv...@hotmail.com Hi, Have you tried the recent rasterImage() function? HTH, baptiste On Sep 8, 2010, at 7:30 PM, Stephen T. wrote: Hi list, I wonder if anyone has thoughts on making image plots in R [using image() or image.plot(), or filled.contour()]- I've made quite a bit now, but they seem quite large in size when exported to pdf file format (even after compressing with pdftk or ghostscript, which I regularly do). I know that for images, raster graphics output (png, tiff) may be the way to go, but often the ones I make are multi-panel plots with other graphics on them, and are usually included in a LaTeX document (PDFLaTeX does accept png) and require stretching/shrinking (and/or possibly editing with Adobe Illustrator). I have had some luck exporting image plots from Matlab (to postscript or pdf) before in the sense that the files seem smaller and less pixelated. Is this a difference in the way image() plots are produced, or with the way the image is written to the pdf() device (if anyone is familiar with other image-exporting programs...)? The other day I had a 13MB dataset, and probably plotted 3/4 of it! using image() and the compressed pdf output was about 8 MB (it contained other stuff but was an addition of a few KB). I tried filled.contour(), as I understand that it colors polygons to fill contours instead of coloring rectangles at each pixel - and it has saved me before - but this time the contours may have been too sharp as as its compressed pdf came out to be 62 MB... (ouch!). I have not tested this data set with other software programs so it may just have been a difficult data set. Is there a good solution to this (or is it simply not to use a vector-graphics format in these instances), and just for my curiosity, are you aware of any things that other software (data analysis) programs do uder the hood to make their exported images smaller/smoother? Thanks much! Stephen [[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. __ 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.
