Dear expeRts, I would like to create a scatter plot matrix with splom(). The lower panel should contain some additional information about the samples shown in the upper panel plot, see the splom() call below. Now two questions came up: (1) The lower panels show "tau" and "alpha" on top of each other. How can I plot *three* expressions on top of each other? I tried several approaches (see the trials below), but couldn't manage to get this to work properly. (2) Is there the possibility to plot the two/three lines (containing "tau = ..", "alpha = ..") aligend according to the equality sign?
Cheers, Marius library(lattice) f <- function(i,j) i+j U <- matrix(runif(3000), ncol=3) splom(U, superpanel=function(z, ...){ tau <- cor(U, method="kendall") df=data.frame(rows=as.vector(row(tau)), columns=as.vector(col(tau)), vals=as.vector(tau)) # data frame of row indices, column indices, and tau values df=subset(df,columns<rows) # subset for lower left triangle with(df,{ panel.text(x=rows, y=columns, labels=as.expression(unlist(lapply(1:length(vals), function(i) substitute(atop(tau==tau.,alpha==alpha.), list(tau.=vals[i], alpha.=round(vals[i],3)) ) ))) ) }) panel.pairs(z, upper.panel=panel.splom, lower.panel=function(...){}, ...) }) ## some minimal "trial" examples: plot(0,0,main=paste("alpha=1","\n","beta=2","\n","gamma=3",sep="")) plot(0,0,main=expression(atop(atop(alpha==1, beta==2), gamma==3))) plot(0,0,main=paste(expression(alpha==1),"\n",expression(beta==2),"\n", expression(gamma==3), sep="")) plot(0,0,main=substitute(paste(alpha==1,x,beta==2,x, gamma==3, sep=""), list(x="\n"))) plot(0,0,main=expression(cat(alpha==1, "\n", beta==2, "\n", gamma==3, sep=""))) plot(0,0,main=cat(expression(alpha==1), "\n", expression(beta==2), "\n", expression(gamma==3), sep="")) ______________________________________________ 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.