[R] faster vector subtraction??

Achim Zeileis zeileis at ci.tuwien.ac.at
Wed Jan 16 21:48:47 CET 2002


Søren Merser wrote:
> 
> hi
> is there a faster way to do this?
> 
> i <- 1
> for(x in vector1)
>      for(y in vector2) {
>          m[[i]] <- (x - y)
>          i <- i + 1
>       }

I'm not completely sure, what you want, but this might give the desired
answer:
outer(vector1, vector2, FUN = "-")

Hope that helps
Z


> regards soren
> 
> -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
> r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
> Send "info", "help", or "[un]subscribe"
> (in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
> _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._



More information about the R-help mailing list