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Port FullPivLU to PermutationMatrix

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This commit is contained in:
Benoit Jacob
2009-11-16 17:05:12 -05:00
parent 76c614f9bd
commit b90744dc05
4 changed files with 38 additions and 34 deletions
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6
doc/snippets/class_FullPivLU.cpp
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@@ -13,8 +13,4 @@ cout << "Here is the U part:" << endl;
Matrix5x3 u = lu.matrixLU().part<UpperTriangular>();
cout << u << endl;
cout << "Let us now reconstruct the original matrix m:" << endl;
Matrix5x3 x = l * u;
Matrix5x3 y;
for(int i = 0; i < 5; i++) for(int j = 0; j < 3; j++)
y(i, lu.permutationQ()[j]) = x(lu.permutationP()[i], j);
cout << y << endl; // should be equal to the original matrix m
cout << lu.permutationP().inverse() * l * u * lu.permutationQ().inverse() << endl;