[S] Re: Products of pairs

[fear@scmp.scm.liverpool.ac.uk (Simon Fear)]

> Is there a simple way to obtain the products of all possible pairs of
> values that are in a data frame column?

This recursive function will do it, not necessarily as quickly as some other 
suggestions I'm sure you will get.

> cprods
function(x)
{
        if(length(x) <= 1)
             return(NULL)
        else c(x[1] * x[-1], cprods(x[-1]))
}

Simon Fear

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