Thank you for the solutions! I have the first one working and it does exactly what I am looking for. Unfortunately I have to put the plot in a common figure alongside other plots made in the basic environment (challenging!). With the second method, I was unable to make the stacked bars locate to the appropriate positions along the X axis (ie the appropriate time), which, though unconventional is required for my figure. So I am still looking for a complete solution in the basic plotting environment.
I have boiled my problem down to this minimal example: # Made-up data tC <- textConnection(" Time Type1 Type2 Type3 1.3 .50 .25 .25 4.5 .55 .25 .20 5.2 .65 .20 .15 ") data1 <- read.table(header=TRUE, tC) data2 <- data.frame(Time=rep(data1$Time, 3), stack(data1[,2:4])) close.connection(tC) # PLOT1 Scatterplot attach(data1) par(mar=c(1,1,1,1)) plot(Time, Type1, frame=T, ylab="Divergence", col=rgb(0,100,0,50,maxColorValue=255), main="plot 1", xlim= c(0,6), ylim= c(0, 1), axes=FALSE, xlab=" ") detach(data1) # PLOT2 barplot require(lattice) attach(data2) barchart(values ~ Time, group=ind, data=data2, stack=TRUE, horizontal=FALSE, main="not there yet") plot2 <- xyplot(values ~ Time, group=ind, data=data2, stack=TRUE, horizontal=FALSE, panel=panel.barchart, ylim=c(-0.05,1.05), xlim=c(0,6), main="Plot 2- how can I plot below plot1?") print(plot2) detach(data2) The only thing left is to get both plots to be vertically aligned, one above the other on the same figure. Is this possible? Thanks for all of your thoughts. Marcel Marcel -- View this message in context: http://r.789695.n4.nabble.com/Stacked-bar-plot-of-frequency-vs-time-tp3659715p3669311.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.