[R] Dataframe and conditions
fgrelier at weborama.com
Tue May 14 10:06:12 CEST 2013
I have in a dataframe X : 3 Variables X$a , X$b, X$c
I would like to replace in X the values of X$a by the values of X$c but
only when X$b=="TRUE"
I have tried to put in place a loop but as I have a lot of rows it is very
very long to run.
Thanks for your help
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