Dear R help(ers). I'm an R-learner (about 10 hours now) trying to make a ranked dot plot where the symbols are coded by two variables concurrently. I'm trying to use Deepanyan Sarkar's book 'Lattice' as a guide but get the feeling it is a bit advanced for my level of understanding.
I have three questions Q1. Right now I like to know how to get the dual coding working on the points on a dotplot and also annotate these in a key. Specifically I'm attempting to code the fill of the points by a variable called 'Commodity' but would like have different symbols to refelect a second variable called 'Year' (say square, triangle and circle for different years). My code so far is as follows: ## initalise library("lattice") ##read the data to a variable Cal_dat <- read.table("Calibration2.dat",header = TRUE,sep = "\t",) ## set up plotting colours for the fills col.pat<-c("violet","cyan","green","red","blue","black","yellow") ##set up the plot key to be inside the plot plot.key<-list( corner=c(1,0), text=list(levels(Cal_dat$Commodity)), title="Ore type", points=list(pch=21,cex=1.3,fill=col.pat,col="black") ) ##set some parameters for the dotplot trellis.par.set( dot.line=list(col = "transparent"), axis.line=list(col = "grey90"), axis.text=list(col ="grey50", cex=0.8), panel.background=list(col="grey98"), par.xlab.text= list(col="grey50") ) ## Create the dot plot dotplot(reorder(Mine, Resc_Gt)~ Resc_Gt,groups=Commodity, data=Cal_dat, cex=1.2, pch=21, aspect=2.0, key=plot.key, col="black", fill=col.pat, origin=0, type = c("p", "h"), main = "Resource Tonnage", xlab= "tonnes (billions)" ) The dot plot so far is attached as well as the input data. Q2 I'm puzzled by the waring message (below) I get when runnin the current code as follows (What does this mean and why does it occur). "Warning message: In trellis.par.set(dot.line = list(col = "transparent"), axis.line = list(col = "grey90"), : Note: The default device has been opened to honour attempt to modify trellis settings" Q3 Can anybody recommend a good 'starters' book for learning plotting in R that is reasonably clear on the basics. My primary interest is the graphing tools that are in lattice (hence trying the Deepayan Sarkar book), but I'm finding this guide rather tough going. Thanks in advance - MarkM http://r.789695.n4.nabble.com/file/n3758248/Calibration2.dat Calibration2.dat http://r.789695.n4.nabble.com/file/n3758248/Ranked_boxplot_by_commodity.png Ranked_boxplot_by_commodity.png -- View this message in context: http://r.789695.n4.nabble.com/Dot-plot-with-two-grouping-variables-concurrently-tp3758248p3758248.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.