I just started using R last week. I have a dataset with 3 columns - Plate, Well and Raw I need to make a simple plot(Well~Raw) but only when Plate = 101 Thanks for your help. -- View this message in context: http://r.789695.n4.nabble.com/Simple-conditional-plot-tp3654300p3654300.html Sent from the R help mailing list archive at Nabble.com.