Re: [R] faster vector subtraction??

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From: Ben Bolker (ben@zoo.ufl.edu)
Date: Thu 17 Jan 2002 - 08:00:07 EST 

Message-id: <Pine.LNX.4.30.0201161557090.21365-100000@bolker.zoo.ufl.edu>

  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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