[R] vectoring a simple for

[ripley@stats.ox.ac.uk]

On Mon, 25 Nov 2002, Cezar Augusto de Freitas Anselmo wrote:

> Hi all. A simple question.
>
> Supose that I have a vector beta <- c(1,2,3)
> I need a vector which indice i be beta[i]*sum(beta[-i])
> For example,
> result <- rep(0,3)
> for(i in 1:3) result[i] <- beta[i]*sum(beta[-i])
> result
> [1] 5 8 9
> How I do it with no for?

beta * (sum(beta) - beta)

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
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