Thanks for the tip!!! I read the R manual and some other basic helps. The problem here is I dont know even the name of what I´m looking for.... -- View this message in context: http://r.789695.n4.nabble.com/How-do-I-assign-boolean-o-1-values-to-a-column-tp3544304p3545484.html Sent from the R help mailing list archive at Nabble.com.