Hi,
I am stuck with creating a conditional categorical variable in R
If my dataframe data_2 has 3 variables A,B,C I want to create variable D
which would be something like :
data_2$D <- ifelse(data_2$A < data_2$B & promotion_ind =="N",1,0),
this throws up an error "In Ops.factor(data_2$A,data_2$B) :
< not meaningful for factors
I have tried converting the dataframe to a matrix using
data.matrix(data_2, rownames.force = NA) but that did not help,
Can anybody tell me how to go about doing this?
Thanks in advance,
Doy
American Express made the following annotations on Wed Apr 18 2012 05:37:16
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American Express a ajouté le commentaire suivant le Wed Apr 18 2012 05:37:16
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