Re: [R] rotate column names in large matrix
Thank you both, these are very helpful hints. Chris, could you please suggest how to modify what you sent to also show the same labels as (horizontal) row names? I have not yet mastered the details of R graphics... Many thanks in advance, Lara On Mon, Nov 15, 2010 at 3:25 PM, Chris Stubben stub...@lanl.gov wrote: You could display the matrix as an image then add column names (rotated used srt) if you really want them. x - cor(matrix(rnorm(600), 60, 100)) # set margins with extra space at top and xpd=TRUE to write outside plot region op-par(mar=c(1,1,5,1), xpd=TRUE) # display image without the 90 degree counter clockwise rotation image(t(x[nrow(x):1,]), axes=FALSE) ## add 100 column names y-paste(column, 1:100) text( seq(0,1,length=100) , 1.01, y, pos = 2, srt = 270, offset=0, cex=.7) Chris Stubben Lara Poplarski wrote: I have a large (1600*1600) matrix generated with symnum, that I am using to eyeball the structure of a dataset. I have abbreviated the column names with the abbr.colnames option. One way to get an even more compact view of the matrix would be to display the column names rotated by 90 degrees. Any pointers on how to do this would be most useful. Any other tips for displaying the matrix in compact form are of course also welcome. -- View this message in context: http://r.789695.n4.nabble.com/rotate-column-names-in-large-matrix-tp3043493p3043927.html Sent from the R help mailing list archive at Nabble.com. __ 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] rotate column names in large matrix
Just increase the margins on the left side and add the rownames x - cor(matrix(rnorm(600), 60, 100)) rownames(x)-paste(row, 1:100) op-par(mar=c(1,5,1,1), xpd=TRUE) image(t(x[nrow(x):1,]), axes=FALSE) text(-0.01, seq(0,1,length=nrow(x) ), rownames(x), pos = 2, offset = 0, cex = .7) Another option is to search the R graphics manual at http://rgm2.lab.nig.ac.jp/RGM2/images.php and maybe you'll find a function in all those packages that plots what you need. Try searching for symnum or image key or matrix plot (in quotes). For matrix plot, there's a function in the plotrix package that will add a key or even show values in the cells.. library(plotrix) color2D.matplot(x, show.legend=TRUE, red=1, blue=0) Chris Lara Poplarski wrote: Chris, could you please suggest how to modify what you sent to also show the same labels as (horizontal) row names? I have not yet mastered the details of R graphics... -- View this message in context: http://r.789695.n4.nabble.com/rotate-column-names-in-large-matrix-tp3043493p3045366.html Sent from the R help mailing list archive at Nabble.com. __ 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] rotate column names in large matrix
Hi Lara, Hmm, I've never seen column names rotated in R (certainly you could in graphics, etc. and this should do it in that case: lapply(strsplit(colnames(x), ''), paste, collapse = \n) ). You could transpose the matrix so the columns become the rows and then just have numbers (1:1600) as the columns? That's the best solution I've found when dealing with large correlation matrices. I also usually set options(digits = 2) or thereabouts (or use round() ). I'd be interested in seeing any other ideas people have also as this has been troublesome to me in the paste some too. As much as I hate to say it, I find it easier to view some of these things in Excel (you can just write the matrix to the clipboard and paste into Excel or probably open office (though I have not tried)) because it has easy scrolls bars and zooming. Cheers, Josh On Mon, Nov 15, 2010 at 9:47 AM, Lara Poplarski larapoplar...@gmail.com wrote: Dear List, I have a large (1600*1600) matrix generated with symnum, that I am using to eyeball the structure of a dataset. I have abbreviated the column names with the abbr.colnames option. One way to get an even more compact view of the matrix would be to display the column names rotated by 90 degrees. Any pointers on how to do this would be most useful. Any other tips for displaying the matrix in compact form are of course also welcome. Many thanks, Lara [[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. -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ __ 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] rotate column names in large matrix
You could display the matrix as an image then add column names (rotated used srt) if you really want them. x - cor(matrix(rnorm(600), 60, 100)) # set margins with extra space at top and xpd=TRUE to write outside plot region op-par(mar=c(1,1,5,1), xpd=TRUE) # display image without the 90 degree counter clockwise rotation image(t(x[nrow(x):1,]), axes=FALSE) ## add 100 column names y-paste(column, 1:100) text( seq(0,1,length=100) , 1.01, y, pos = 2, srt = 270, offset=0, cex=.7) Chris Stubben Lara Poplarski wrote: I have a large (1600*1600) matrix generated with symnum, that I am using to eyeball the structure of a dataset. I have abbreviated the column names with the abbr.colnames option. One way to get an even more compact view of the matrix would be to display the column names rotated by 90 degrees. Any pointers on how to do this would be most useful. Any other tips for displaying the matrix in compact form are of course also welcome. -- View this message in context: http://r.789695.n4.nabble.com/rotate-column-names-in-large-matrix-tp3043493p3043927.html Sent from the R help mailing list archive at Nabble.com. __ 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.
