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bug #1271: add SparseMatrix::coeffs() methods returning a 1D view of the non zero coefficients.

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Gael Guennebaud
2016-08-29 12:06:37 +02:00
parent a93e354d92
commit 7e029d1d6e
3 changed files with 38 additions and 0 deletions
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19
Eigen/src/SparseCore/SparseCompressedBase.h
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@@ -106,6 +106,25 @@ class SparseCompressedBase
/** \returns whether \c *this is in compressed form. */
inline bool isCompressed() const { return innerNonZeroPtr()==0; }
/** \returns a read-only view of the stored coefficients as a 1D array expression.
*
* \warning this method is for \b compressed \b storage \b only, and it will trigger an assertion otherwise.
*
* \sa valuePtr(), isCompressed() */
const Map<const Array<Scalar,Dynamic,1> > coeffs() const { eigen_assert(isCompressed()); return Array<Scalar,Dynamic,1>::Map(valuePtr(),nonZeros()); }
/** \returns a read-write view of the stored coefficients as a 1D array expression
*
* \warning this method is for \b compressed \b storage \b only, and it will trigger an assertion otherwise.
*
* Here is an example:
* \include SparseMatrix_coeffs.cpp
* and the output is:
* \include SparseMatrix_coeffs.out
*
* \sa valuePtr(), isCompressed() */
Map<Array<Scalar,Dynamic,1> > coeffs() { eigen_assert(isCompressed()); return Array<Scalar,Dynamic,1>::Map(valuePtr(),nonZeros()); }
protected:
/** Default constructor. Do nothing. */
SparseCompressedBase() {}