Many thanks for your reply. Yes absolutely. So this is a small example:
> library(ca) > table <- read.table("test", header=TRUE) > table codon1 codon2 codon3 gene1 4.0 7 11 gene2 7.0 222 8 gene3 0.2 3 8 > ca_analysis <- ca(table) > plot <- plot(ca_analysis) and then i took a screen shot of the plot i can see. http://r.789695.n4.nabble.com/file/n4453046/Screen_shot_2012-03-07_at_12.00.44.png so now for example i have a seperate file with 2 gene names: gene2 gene3 and i want to find these two genes/nodes on the graph, and either highlight them a different color, or draw a border/shade them in some way. basically highlight them in any way? is this any more helpful to explain what i mean? Aoife -- View this message in context: http://r.789695.n4.nabble.com/find-points-on-a-graph-tp4452746p4453046.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.