Mercurial > repos > public > sbplib
comparison mononomial.m @ 820:501750fbbfdb
Merge with feature/grids
| author | Jonatan Werpers <jonatan@werpers.com> |
|---|---|
| date | Fri, 07 Sep 2018 14:40:58 +0200 |
| parents | 0090a86d8b72 |
| children |
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| 819:fdf0ef9150f4 | 820:501750fbbfdb |
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| 1 % calculate a N-D mononomial with powers k in points x: | |
| 2 % z = x(:,1).^k(1) * x(:,2).^k(2) * ... | |
| 3 function z = mononomial(x, k) | |
| 4 assert(size(x,2) == length(k), 'k must have the same length as the width of x'); | |
| 5 | |
| 6 if any(k < 0) | |
| 7 z = x(:,1)*0; | |
| 8 return | |
| 9 end | |
| 10 | |
| 11 denom = prod(factorial(k)); | |
| 12 | |
| 13 for i = 1:length(k) | |
| 14 x(:,i) = x(:,i).^k(i); | |
| 15 end | |
| 16 z = prod(x,2)/denom; | |
| 17 end |