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update tutorial

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This commit is contained in:
Benoit Jacob 2007-09-09 08:17:08 +00:00
parent fe9b6b8f17
commit 1dab53d300
1 changed files with 4 additions and 5 deletions
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doc/tutorial.cpp
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@ -16,14 +16,13 @@ int main(int, char **)
// notice how we are mixing fixed-size and dynamic-size types.
cout << "In the top-left block, we put the matrix m shown above." << endl;
// here we need to use .xpr() to allow write access to the block.
m2.xpr().block(0,1,0,1) = m;
m2.block(0,1,0,1) = m;
cout << "In the bottom-left block, we put the matrix m*m, which is:" << endl << m*m << endl;
m2.xpr().block(2,3,0,1) = m * m;
m2.block(2,3,0,1) = m * m;
cout << "In the top-right block, we put the matrix m+m, which is:" << endl << m+m << endl;
m2.xpr().block(0,1,2,3) = m + m;
m2.block(0,1,2,3) = m + m;
cout << "In the bottom-right block, we put the matrix m-m, which is:" << endl << m-m << endl;
m2.xpr().block(2,3,2,3) = m - m;
m2.block(2,3,2,3) = m - m;
cout << "Now the 4x4 matrix m2 is:" << endl << m2 << endl;
// here we don't need to use .xpr() because we only need read access.