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finish to merge Array into Core:

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- mv Array/* into Core/
- merge Functors.h files, and move Norms.h into Dot.h
This commit is contained in:
Gael Guennebaud
2010-06-19 23:36:38 +02:00
parent 575ac5409c
commit 7fd8418b19
18 changed files with 317 additions and 374 deletions
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58
Eigen/src/Core/Dot.h
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@@ -80,6 +80,8 @@ MatrixBase<Derived>::dot(const MatrixBase<OtherDerived>& other) const
return ei_dot_nocheck<Derived,OtherDerived>::run(*this, other);
}
//---------- implementation of L2 norm and related functions ----------
/** \returns the squared \em l2 norm of *this, i.e., for vectors, the dot product of *this with itself.
*
* \sa dot(), norm()
@@ -128,6 +130,61 @@ inline void MatrixBase<Derived>::normalize()
*this /= norm();
}
//---------- implementation of other norms ----------
template<typename Derived, int p>
struct ei_lpNorm_selector
{
typedef typename NumTraits<typename ei_traits<Derived>::Scalar>::Real RealScalar;
inline static RealScalar run(const MatrixBase<Derived>& m)
{
return ei_pow(m.cwiseAbs().array().pow(p).sum(), RealScalar(1)/p);
}
};
template<typename Derived>
struct ei_lpNorm_selector<Derived, 1>
{
inline static typename NumTraits<typename ei_traits<Derived>::Scalar>::Real run(const MatrixBase<Derived>& m)
{
return m.cwiseAbs().sum();
}
};
template<typename Derived>
struct ei_lpNorm_selector<Derived, 2>
{
inline static typename NumTraits<typename ei_traits<Derived>::Scalar>::Real run(const MatrixBase<Derived>& m)
{
return m.norm();
}
};
template<typename Derived>
struct ei_lpNorm_selector<Derived, Infinity>
{
inline static typename NumTraits<typename ei_traits<Derived>::Scalar>::Real run(const MatrixBase<Derived>& m)
{
return m.cwiseAbs().maxCoeff();
}
};
/** \returns the \f$ \ell^p \f$ norm of *this, that is, returns the p-th root of the sum of the p-th powers of the absolute values
* of the coefficients of *this. If \a p is the special value \a Eigen::Infinity, this function returns the \f$ \ell^p\infty \f$
* norm, that is the maximum of the absolute values of the coefficients of *this.
*
* \sa norm()
*/
template<typename Derived>
template<int p>
inline typename NumTraits<typename ei_traits<Derived>::Scalar>::Real
MatrixBase<Derived>::lpNorm() const
{
return ei_lpNorm_selector<Derived, p>::run(*this);
}
//---------- implementation of isOrthogonal / isUnitary ----------
/** \returns true if *this is approximately orthogonal to \a other,
* within the precision given by \a prec.
*
@@ -169,4 +226,5 @@ bool MatrixBase<Derived>::isUnitary(RealScalar prec) const
}
return true;
}
#endif // EIGEN_DOT_H