Hi, I am just starting to use R for a graduate course, and I like how the correlation matrix at http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=137
I did something similar by copying from the examples(pairs), but it seems that I need to jitter the bottom panel... and I have no idea how to do that, and I mean no idea at all. I'd appreciate any help... Here are the graphs: http://socy602.pbwiki.com/f/dep_correlationmatrix.jpeg http://socy602.pbwiki.com/f/indep_correlationmatrix.jpeg And this is the code I used to produce the graphs (not that I understand it, but): ###################### # Primary Component Analyses ###################### ###################### # Dependent variables ###################### # List of these variables: # langfamr , ethdifxx , catness , gc7 , gc8r , gc12 , culdifxx , poldifxx , ecdifxx ###################### # Look at correlation matrix for these cor(MAR[,c("langfamr" , "ethdifxx" , "catness" , "gc7" , "gc8r" , "gc12" , "culdifxx" , "poldifxx" , "ecdifxx" )], use="complete.obs") # Big time correlation matrix panel.cor <- function(x, y, digits=2, prefix="", cex.cor) { usr <- par("usr"); on.exit(par(usr)) par(usr = c(0, 1, 0, 1)) r <- abs(cor(x, y)) txt <- format(c(r, 0.123456789), digits=digits)[1] txt <- paste(prefix, txt, sep="") if(missing(cex.cor)) cex <- 0.8/strwidth(txt) text(0.5, 0.5, txt, cex = cex * r) } MAR.omitdep <- na.omit(MAR[,c("langfamr" , "ethdifxx" , "catness" , "gc7" , "gc8r" , "gc12" , "culdifxx" , "poldifxx" , "ecdifxx" )]) pairs(MAR.omitdep[,c("langfamr" , "ethdifxx" , "catness" , "gc7" , "gc8r" , "gc12" , "culdifxx" , "poldifxx" , "ecdifxx" )], lower.panel=panel.smooth, upper.panel=panel.cor) # Save it dev.copy(jpeg,filename="dep_correlationmatrix.jpeg",height=600, width=800,bg="white") dev.off() ###################### # Independent variables ###################### # List of variables # poldis , polres , ecdis , culres , gcc1 ###################### # Look at the correlation matrix cor(MAR[,c("poldis" , "polres" , "ecdis" , "culres" , "gcc1" )], use="complete.obs") # Big time correlation matrix panel.cor <- function(x, y, digits=2, prefix="", cex.cor) { usr <- par("usr"); on.exit(par(usr)) par(usr = c(0, 1, 0, 1)) r <- abs(cor(x, y)) txt <- format(c(r, 0.123456789), digits=digits)[1] txt <- paste(prefix, txt, sep="") if(missing(cex.cor)) cex <- 0.8/strwidth(txt) text(0.5, 0.5, txt, cex = cex * r) } MAR.omitindep <- na.omit(MAR[,c("poldis" , "polres" , "ecdis" , "culres" , "gcc1" )]) pairs(MAR.omitindep[,c("poldis" , "polres" , "ecdis" , "culres" , "gcc1" )], lower.panel=panel.smooth, upper.panel=panel.cor) # Save it dev.copy(jpeg,filename="indep_correlationmatrix.jpeg",height=600, width=800,bg="white") dev.off() Thanks a lot in advance, Sincerely, Mehmet. ______________________________________________ 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.
