Le 19/12/12 11:17, Lamy Alain a écrit :
Hi,
Does anyone know how to perform efficiently an operation like :
u .^k
with:
u = [u1, u2, ..., un] // ui : real numbers
and:
k = [k1; k2; kp] // ki : positive integers
The result being :
[ u1^k1, u2^k1, ..., un^k1;
u1^k2, u2^k2, ..., un^k2;
...
u1^kp, u2^kp, ..., un^kp ]
I know how to do it with cumprod (for instance), but it does not seem to be
efficient enough.
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maybe u(ones(1,p),:).^k(:,ones(1,n)) ?
S.
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