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author | Gael Guennebaud <g.gael@free.fr> | 2017-08-22 16:48:07 +0200 |
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committer | Gael Guennebaud <g.gael@free.fr> | 2017-08-22 16:48:07 +0200 |
commit | 9deee79922c38415125e4d6c2cd34cd05bda7889 (patch) | |
tree | da1abdf71c944400bad9abff3ce49cd0669ad66c /Eigen/src/Core/CwiseNullaryOp.h | |
parent | bc4dae9aeb84cc3d3114ee496d55654cc7256584 (diff) |
bug #1457: add setUnit() methods for consistency.
Diffstat (limited to 'Eigen/src/Core/CwiseNullaryOp.h')
-rw-r--r-- | Eigen/src/Core/CwiseNullaryOp.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/Eigen/src/Core/CwiseNullaryOp.h b/Eigen/src/Core/CwiseNullaryOp.h index 144608ec2..b1923da0f 100644 --- a/Eigen/src/Core/CwiseNullaryOp.h +++ b/Eigen/src/Core/CwiseNullaryOp.h @@ -861,6 +861,42 @@ template<typename Derived> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const typename MatrixBase<Derived>::BasisReturnType MatrixBase<Derived>::UnitW() { return Derived::Unit(3); } +/** \brief Set the coefficients of \c *this to the i-th unit (basis) vector + * + * \param i index of the unique coefficient to be set to 1 + * + * \only_for_vectors + * + * \sa MatrixBase::setIdentity(), class CwiseNullaryOp, MatrixBase::Unit(Index,Index) + */ +template<typename Derived> +EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Derived& MatrixBase<Derived>::setUnit(Index i) +{ + EIGEN_STATIC_ASSERT_VECTOR_ONLY(Derived); + eigen_assert(i<size()); + derived().setZero(); + derived().coeffRef(i) = Scalar(1); + return derived(); +} + +/** \brief Resizes to the given \a newSize, and writes the i-th unit (basis) vector into *this. + * + * \param newSize the new size of the vector + * \param i index of the unique coefficient to be set to 1 + * + * \only_for_vectors + * + * \sa MatrixBase::setIdentity(), class CwiseNullaryOp, MatrixBase::Unit(Index,Index) + */ +template<typename Derived> +EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Derived& MatrixBase<Derived>::setUnit(Index newSize, Index i) +{ + EIGEN_STATIC_ASSERT_VECTOR_ONLY(Derived); + eigen_assert(i<newSize); + derived().resize(newSize); + return setUnit(i); +} + } // end namespace Eigen #endif // EIGEN_CWISE_NULLARY_OP_H |