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add coeff(int,int), coeff(int) and value() functions to the inner product specialization

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This commit is contained in:
Gael Guennebaud 2009-08-26 00:24:22 +02:00
parent d0a5da95b1
commit 3705498721
1 changed files with 10 additions and 1 deletions
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11
Eigen/src/Core/Product.h
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@ -164,11 +164,20 @@ class GeneralProduct<Lhs, Rhs, InnerProduct>
GeneralProduct(const Lhs& lhs, const Rhs& rhs) : Base(lhs,rhs) {}
EIGEN_STRONG_INLINE Scalar value() const
{
return (m_lhs.transpose().cwise()*m_rhs).sum();
}
template<typename Dest> void scaleAndAddTo(Dest& dst, Scalar alpha) const
{
ei_assert(dst.rows()==1 && dst.cols()==1);
dst.coeffRef(0,0) += alpha * (m_lhs.transpose().cwise()*m_rhs).sum();
dst.coeffRef(0,0) += alpha * value();
}
EIGEN_STRONG_INLINE Scalar coeff(int, int) const { return value(); }
EIGEN_STRONG_INLINE Scalar coeff(int) const { return value(); }
};
/***********************************************************************