[R] faster vector subtraction??

[Ben Bolker]

  outer() is the basic answer:

  as.vector(t(outer(x,y,"-")))

 [ or as.list() if you really want it as a list ]

On Wed, 16 Jan 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
>       }
>
> regards soren
>
>
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-- 
318 Carr Hall                                bolker at zoo.ufl.edu
Zoology Department, University of Florida    http://www.zoo.ufl.edu/bolker
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