On Dec 4, 2010, at 8:56 PM, Nasrin Pak wrote: > Hi; > > I'm trying to use bandplot function. I've installed the gplots > package but > still the function is not found in R. what's the problem? That usually means you have not yet loaded it. Try one of: library(gplots) require(gplots) -- David Winsemius, MD West Hartford, CT