haotu : an open lab notebook

2016/07/14

aggregate by removing NA

Filed under: Manipulate Data in R, R, R Stats, Uncategorized — Tags: — S @ 08:43
na.collapse<-function(x)
{
 x.<-unique(x[!is.na(x)])
   if(length(x.)==0)
 {
   return(NA)
   } else {
     if(length(x.)==1){
     return(x.)
   } else {
     return(paste(x.,collapse="|"))
   }
  }
}
na.collapse(x)
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