dot product

2009-12-11 21:37:40 +00:00 · 2009-12-11 21:37:40 +00:00 · bca489384e
parent 76b55aba7d
commit bca489384e
1 changed files with 3 additions and 0 deletions
--- a/cpp/Vector.h
+++ b/cpp/Vector.h
@ -142,6 +142,9 @@ Vector ediv(const Vector &a, const Vector &b);
 */
 double sum(const Vector &a);

+/** Dot product */
+inline double dot(const Vector &a, const Vector& b) { return sum(emul(a,b)); }
+
 /**
 * house(x,j) computes HouseHolder vector v and scaling factor beta
 *  from x, such that the corresponding Householder reflection zeroes out