Hi All,
I have attempted to extract only the factor columns from an
existing data set inside a loop without success . I tried the transform
function which worked, but not inside the loop (attempts with cbind did
not work either - inside a loop). Here is my function:
getcatcolumns<-function(x)
{
# ignore type checking for data frames etc
res <- data.frame()
for(i in 1:length(x))
{
if (class(x[,i]) =="factor") res <- transform(res, colname =
x[,i]) # append the factor column to the new data frame (res)
}
return(res)
}
The error I get is: "arguments imply differing number of rows: 0, 5000"
All help appreciated.
Regards,
Serge Merzliakov
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