Hi John,
Use factor():
aframe2$x <- factor(aframe2$x)
Or, for all columns at once (there might be an easier solution):
aframe2 <- as.data.frame(lapply(aframe1, factor))
see ?factor
HTH,
Ivan
Le 2/28/2011 18:13, John Edwards a écrit :
Dear All,
I'm not sure if I understand the parameter stringsAsFactors correctly. I'm
trying to convert the string columns in aframe1 to factors. But it
seems stringsAsFactors=T in as.data.frame() doesn't do anything. Could
anybody let know what is the correct way to converting strings to factors?
aframe1=data.frame(x=LETTERS[1:10], y=LETTERS[1:10], stringsAsFactors=F)
aframe2=as.data.frame(aframe1, stringsAsFactors=T)
str(aframe1)
'data.frame': 10 obs. of 2 variables:
$ x: chr "A" "B" "C" "D" ...
$ y: chr "A" "B" "C" "D" ...
str(aframe2)
'data.frame': 10 obs. of 2 variables:
$ x: chr "A" "B" "C" "D" ...
$ y: chr "A" "B" "C" "D" ...
Thanks,
John
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