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| author |  Gael Guennebaud <g.gael@free.fr> | 2008-11-20 11:01:17 +0000 |
|---|---|---|
| committer | Gael Guennebaud <g.gael@free.fr> | 2008-11-20 11:01:17 +0000 |
| commit | a040b7f15daa915b997dd4776ce84809ff38fbe6 (patch) | |
| tree | d73321b820a72f8989991ab5392b20b948cc445f /doc/QuickStartGuide.dox | |
| parent | cc6121b98d16d567580743ac54d4809124b2b29c (diff) | |
tutorial: extend casting section with set
Diffstat (limited to 'doc/QuickStartGuide.dox')
| -rw-r--r-- | doc/QuickStartGuide.dox | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/doc/QuickStartGuide.dox b/doc/QuickStartGuide.dox index 25bbf4632..5e5959e18 100644 --- a/doc/QuickStartGuide.dox +++ b/doc/QuickStartGuide.dox @@ -190,13 +190,21 @@ v = 6 6 6 \subsection TutorialCasting Casting -In Eigen, any matrices of same size and same scalar type are all naturally compatible. The scalar type can be explicitely casted to another one using the template cast() function: +In Eigen, any matrices of same size and same scalar type are all naturally compatible. The scalar type can be explicitely casted to another one using the template MatrixBase::cast() function: \code Matrix3d md(1,2,3); Matrix3f mf = md.cast<float>(); \endcode Note that casting to the same scalar type in an expression is free. +The sizes of a resizable destination matrix can be changed automatically using the Matrix::set() function: +\code +MatrixXf res(10,10); +Matrix3f a, b; +res = a + b; // does not work (no automatic resizing) +res.set(a+b); // OK +\endcode + \subsection TutorialMap Map Any memory buffer can be mapped as an Eigen expression: |