On Fri, 11 Jul 2003 [EMAIL PROTECTED] wrote: > Hi Folks, > > Example: > t<-c(1,2,3,4,5,6,7,8,9) > u<-c(1,NA,3,NA,5,NA,7,NA,9) > t[u==5] > --> NA NA 5 NA NA > > Now, if I could somehow set things so that "NA" was FALSE for > indexing, then > t[u==5] > --> 5
t[u %in% 5] > I know I can do it with > t[(u==5)&(!is.na(u))] > but in the situation I am dealing with this leads to massively > cumbersome, typo-prone and hard-to-read code. > > Also, as an extra, it would be very useful if, for instance, > t[u==NA] --> 2 4 6 8 t[ u %in% NA] -thomas Thomas Lumley Assoc. Professor, Biostatistics [EMAIL PROTECTED] University of Washington, Seattle ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help