On Thu, 16 Jun 2011, Sarah Goslee wrote:
Hi Frank,It's not inaccuracy, exactly, and it's intentional. The default behavior is to use a round endcap on a line, and with such a large linewidth that endcap is arcing below and above the starting points. This being R, there's a par for that: putting lend=1 in your lines() statements will give you the result you're looking for.
And for those who can't remember which is which, lend = "butt".
Sarah On Thu, Jun 16, 2011 at 3:03 PM, Frank Harrell <f.harr...@vanderbilt.edu> wrote:Using a line width > 1 results in not only a thicker line but also some fuzz in the other direction, as shown in this example program. You will see that the thick vertical black lines extend below the gray scale horizontal lines. Does anyone know whether this is intended or is it a bug? The application is for displaying a correlation matrix (here just some random U(0,1)s). Thanks -Frank par(mar=c(1,2,0,0), xpd=NA) set.seed(1) r <- matrix(runif(16), nrow=4, dimnames=list(NULL, paste('x', 1:4, sep=''))) p <- nrow(r) v <- colnames(r) plot(c(-.35,p+.5),c(.5,p+.25), type='n', axes=FALSE, xlab='',ylab='') text(rep(.5,p), 1:p, v, adj=1) maxabsr <- max(abs(r[row(r) != col(r)])) for(i in 1:p) { for(j in 1:p) { if(i >= j) next lines(c(i,i),c(j,j+r[i,j]/maxabsr/2), lwd=3) lines(c(i-.2,i+.2),c(j,j), col=gray(.7)) } text(i, i, v[i], srt=-45, adj=0) }-- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ 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.
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______________________________________________ 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.
