search for: removedata

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2007 Dec 15
1
modify a data.frame within a function
...y a single column of a data frame to remove randomly half of the values. I want to do it within a function, but can not assign the modified column back into the data frame. It was easy and successful without a function, so I suspect the problem is the call of the single column within the function. removedata<-function(datafull,var.removed) { attach(datafull) NArandom<-rnorm(n=length(var.removed), mean=0, sd=1) for (i in 1:length(var.removed)) if(NArandom[i]>0) var.removed[i]<-"NA" datamiss<<-datafull detach(datafull) } -- Yuval Sapir, PhDResearcherInstitute of Evolu...