It looks to be a bug. Here is the code and notice that ... is passed to plot (which plots the first series) but not to lines (which plots the rest):
if (!add) { ii <- ii[-1] plot(x[, 1], y[, 1], type = type[1], xlab = xlab, ylab = ylab, xlim = xlim, ylim = ylim, lty = lty[1], lwd = lwd[1], pch = pch[1], col = col[1], cex = cex[1], bg = bg[1], ...) } for (i in ii) { lines(x[, i], y[, i], type = type[i], lty = lty[i], lwd = lwd[i], pch = pch[i], col = col[i], cex = cex[i], bg = bg[i]) } This is from 2.8.1 patched but I noticed the same thing in "R version 2.9.0 Under development (unstable) (2009-03-02 r48041)" On Mon, Mar 23, 2009 at 6:25 PM, Christophe Genolini <cgeno...@u-paris10.fr> wrote: > Hi the list, > > I am using matplot with the option lend="butt", but only the first line (the > black) is printed correctly : > >> matplot(matrix(1:9,3),type="c",lwd=10,lty=1,lend="butt") > > Is it a bug ? > I am using R2.8.1 under windows XP pack3. > > Christophe > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel