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* Added a generic *redux* mini framework allowing custom redux operations

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as well as partial redux (vertical or horizontal redux).
   Includes shortcuts for: sum, minCoeff and maxCoeff.
   There is no shortcut for the partial redux.

 * Added a generic *visitor* mini framework. A visitor is a custom object
   sequentially applied on each coefficient with knowledge of its value and
   coordinates.
   It is currentlly used to implement minCoeff(int*,int*) and maxCoeff(int*,int*).
   findBiggestCoeff is now a shortcut for "this->cwiseAbs().maxCoeff(i,j)"

 * Added coeff-wise min and max.
 * fixed an issue with ei_pow(int,int) and gcc < 4.3 or ICC
This commit is contained in:
Gael Guennebaud
2008-03-16 14:36:25 +00:00
parent 29184ad27d
commit 612350e3f8
10 changed files with 554 additions and 146 deletions
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59
Eigen/src/Core/MatrixBase.h
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@@ -81,7 +81,7 @@ template<typename Derived> class MatrixBase
/**< This is equal to the number of coefficients, i.e. the number of
* rows times the number of columns, or to \a Dynamic if this is not
* known at compile-time. \sa RowsAtCompileTime, ColsAtCompileTime */
MaxRowsAtCompileTime = ei_traits<Derived>::MaxRowsAtCompileTime,
/**< This value is equal to the maximum possible number of rows that this expression
* might have. If this expression might have an arbitrarily high number of rows,
@@ -245,13 +245,6 @@ template<typename Derived> class MatrixBase
Derived& operator*=(const MatrixBase<OtherDerived>& other);
//@}
/** \name Sums of coefficients
*/
//@{
Scalar sum() const;
Scalar trace() const;
//@}
/** \name Dot product and related notions
* including vector norm, adjoint, transpose ...
*/
@@ -350,20 +343,7 @@ template<typename Derived> class MatrixBase
* which has the biggest absolute value.
*/
void findBiggestCoeff(int *row, int *col) const
{
RealScalar biggest = 0;
for(int j = 0; j < cols(); j++)
for(int i = 0; i < rows(); i++)
{
RealScalar x = ei_abs(coeff(i,j));
if(x > biggest)
{
biggest = x;
*row = i;
*col = j;
}
}
}
{ (*this).cwiseAbs().maxCoeff(row, col); }
//@}
/// \name Special functions
@@ -396,6 +376,14 @@ template<typename Derived> class MatrixBase
const CwiseBinaryOp<ei_scalar_quotient_op, Derived, OtherDerived>
cwiseQuotient(const MatrixBase<OtherDerived> &other) const;
template<typename OtherDerived>
const CwiseBinaryOp<ei_scalar_min_op, Derived, OtherDerived>
cwiseMin(const MatrixBase<OtherDerived> &other) const;
template<typename OtherDerived>
const CwiseBinaryOp<ei_scalar_max_op, Derived, OtherDerived>
cwiseMax(const MatrixBase<OtherDerived> &other) const;
const CwiseUnaryOp<ei_scalar_abs_op, Derived> cwiseAbs() const;
const CwiseUnaryOp<ei_scalar_abs2_op, Derived> cwiseAbs2() const;
const CwiseUnaryOp<ei_scalar_sqrt_op, Derived> cwiseSqrt() const;
@@ -414,6 +402,33 @@ template<typename Derived> class MatrixBase
cwise(const MatrixBase<OtherDerived> &other, const CustomBinaryOp& func = CustomBinaryOp()) const;
//@}
/// \name Redux and visitor
//@{
Scalar sum() const;
Scalar trace() const;
typename ei_traits<Derived>::Scalar minCoeff() const;
typename ei_traits<Derived>::Scalar maxCoeff() const;
typename ei_traits<Derived>::Scalar minCoeff(int* row, int* col = 0) const;
typename ei_traits<Derived>::Scalar maxCoeff(int* row, int* col = 0) const;
template<typename BinaryOp>
const PartialRedux<Vertical, BinaryOp, Derived>
verticalRedux(const BinaryOp& func) const;
template<typename BinaryOp>
const PartialRedux<Horizontal, BinaryOp, Derived>
horizontalRedux(const BinaryOp& func) const;
template<typename BinaryOp>
typename ei_result_of<BinaryOp(typename ei_traits<Derived>::Scalar)>::type
redux(const BinaryOp& func) const;
template<typename Visitor>
void visit(Visitor& func) const;
//@}
/// \name Casting to the derived type
//@{
const Derived& derived() const { return *static_cast<const Derived*>(this); }