Christian Schulz wrote: > > Hi, > > sapply((1:NCOL(hermes)),function(x) hist(hermes[,x],main=names(hermes)[x])) > > .......this works , but i would like use it with apply to generate many plots in one >step!
sapply() already *has* generated many plots, if NCOL(hermes) > 1. It's rather complicated to help if one does not know what kind of object "hermes" is [I guess a data.frame, because names() seems to give reasonable results for you] > #################################################################### > > >>apply((1:ncol(hermes)),2,function(x) hist(hermes[,x],main=names(hermes)[x])) > Error in apply(1:ncol(hermes), 2, function(x) hist(hermes[, x], main = >names(hermes)[x])) : > dim(X) must have a positive length apply() expects an array or a matrix, but not a vector. The function within apply works on rows / columns of the matrix given as the first argument, so something like apply(hermes, 2, hist) should do the trick. Anyway, for labeling purposes I'd highly recommend to use a loop rather than apply(). Uwe Ligges > >>apply(hermes[,1:6],2,function(x) hist(hermes[,x],main=names(hermes)[x])) > Error in hist.default(hermes[, x], main = names(hermes)[x]) : > `x' must be numeric > > >>apply(hermes,2,function(x) hist(hermes[,x],main=names(hermes)[x])) > Error in hist.default(hermes[,x ], main = names(hermes)[x]) : > `x' must be numeric > > thanks for advance & regards > > [[alternate HTML version deleted]] > > ______________________________________________ > [EMAIL PROTECTED] mailing list > http://www.stat.math.ethz.ch/mailman/listinfo/r-help ______________________________________________ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help
