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pmdf
2009 Nov 16
3
lapply() not converting columns to factors (no error message)
...obvious.
Thanks a lot,
Aditi
(P.s.- I've tried converting columns one by one to factors this time, and
that works.
>P1L55<-factor(P1L55)
>levels(P1L55)
>[1] "0" "1"
Code:
prm<-read.table("P:\\..... .csv", header=T, ...sep=",", ...)
prmdf<-data.frame(prm)
prmdf[2:13]<-lapply(prmdf[2:13], factor) ## action performed, no error
message
##I tried to pick random columns and check
>levels(P1L55)
>NULL
>is.factor(P1L96)
>FALSE
----------------------
A Singh
Aditi.Singh at bristol.ac.uk
School of Biological Sciences...