diff options
author | Gael Guennebaud <g.gael@free.fr> | 2010-06-28 00:42:57 +0200 |
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committer | Gael Guennebaud <g.gael@free.fr> | 2010-06-28 00:42:57 +0200 |
commit | 75da254fc3f70d5bc5c377ee78b0354ab369dec7 (patch) | |
tree | fe7e743a097a48a832a210008be18c9156d68c1f /doc/examples/tut_arithmetic_dot_cross.cpp | |
parent | aae5994b9e012175ad9d66b1165999e8fa89b360 (diff) |
* use transpose() instead of row vectors (more common use case)
* add a word about noalias and performance for BLAS users
Diffstat (limited to 'doc/examples/tut_arithmetic_dot_cross.cpp')
-rw-r--r-- | doc/examples/tut_arithmetic_dot_cross.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/doc/examples/tut_arithmetic_dot_cross.cpp b/doc/examples/tut_arithmetic_dot_cross.cpp index 0f8e45359..631c9a5e0 100644 --- a/doc/examples/tut_arithmetic_dot_cross.cpp +++ b/doc/examples/tut_arithmetic_dot_cross.cpp @@ -2,11 +2,14 @@ #include <Eigen/Dense> using namespace Eigen; +using namespace std; int main() { Vector3d v(1,2,3); Vector3d w(0,1,2); - std::cout << "Dot product: " << v.dot(w) << std::endl; - std::cout << "Cross product:\n" << v.cross(w) << std::endl; + cout << "Dot product: " << v.dot(w) << endl; + double dp = v.adjoint()*w; // automatic conversion of the inner product to a scalar + cout << "Dot product via a matrix product: " << dp << endl; + cout << "Cross product:\n" << v.cross(w) << endl; } |