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Add Matrix::resizeLike(other) convenience function and test.

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This commit is contained in:
Keir Mierle
2009-02-03 01:43:59 +00:00
parent bc9a276b78
commit b4777379d4
3 changed files with 81 additions and 12 deletions
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36
Eigen/src/Core/Matrix.h
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@@ -248,6 +248,29 @@ class Matrix
m_storage.resize(size, size, 1);
}
/** Resizes *this to have the same dimensions as \a other.
* Takes care of doing all the checking that's needed.
*
* Note that copying a row-vector into a vector (and conversely) is allowed.
* The resizing, if any, is then done in the appropriate way so that row-vectors
* remain row-vectors and vectors remain vectors.
*/
template<typename OtherDerived>
EIGEN_STRONG_INLINE void resizeLike(const MatrixBase<OtherDerived>& other)
{
if(RowsAtCompileTime == 1)
{
ei_assert(other.isVector());
resize(1, other.size());
}
else if(ColsAtCompileTime == 1)
{
ei_assert(other.isVector());
resize(other.size(), 1);
}
else resize(other.rows(), other.cols());
}
/** Copies the value of the expression \a other into \c *this with automatic resizing.
*
* *this might be resized to match the dimensions of \a other. If *this was a null matrix (not already initialized),
@@ -468,18 +491,7 @@ class Matrix
: (rows() == other.rows() && cols() == other.cols())))
&& "Size mismatch. Automatic resizing is disabled because EIGEN_NO_AUTOMATIC_RESIZING is defined");
#endif
if(RowsAtCompileTime == 1)
{
ei_assert(other.isVector());
resize(1, other.size());
}
else if(ColsAtCompileTime == 1)
{
ei_assert(other.isVector());
resize(other.size(), 1);
}
else resize(other.rows(), other.cols());
resizeLike(other);
}
/** \internal Copies the value of the expression \a other into \c *this with automatic resizing.