On 10/31/18 3:47 PM, jim holtman wrote:
s2 <- apply(x*x, 2, sum)
s2
[1] 55 330
<SNIP>
It seems to me to be more "natural" (and perhaps more amenable to
generalisation) to do:
s2 <- apply(x,2,function(v){sum(v^2)})
But it's probably just a matter of taste.
cheers,
Rolf
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