Sparse matrix nonzero count in Eigen 3.3 -

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in eigen 3.2 sparse matrices had method named 'nonzeros' returned count of non-zero elements. method seems gone in eigen 3.3. how 1 obtain number of nonzero in 3.3?

it's still there. in eigen/src/sparsecore/sparsecompressedbase.h line 56 there 1 definition (for sparsecompressedbase).

template<typename derived> class sparsecompressedbase   : public sparsematrixbase<derived> {   ...   protected:     typedef typename base::indexvector indexvector;     eigen::map<indexvector> innernonzeros() { return eigen::map<indexvector>(innernonzeroptr(), iscompressed()?0:derived().outersize()); }     const  eigen::map<const indexvector> innernonzeros() const { return eigen::map<const indexvector>(innernonzeroptr(), iscompressed()?0:derived().outersize()); }    public:      /** \returns number of non 0 coefficients */     inline index nonzeros() const     {       if(derived::isvectoratcompiletime && outerindexptr()==0)         return derived().nonzeros();

more so, quick grep shows definitions (v3.3.0):

$ grep -rn "index nonzeros()" *
src/core/densebase.h:210: inline index nonzeros() const { return size(); }
src/sparsecore/ambivector.h:39: index nonzeros() const;
src/sparsecore/sparseblock.h:42: index nonzeros() const
src/sparsecore/sparseblock.h:436: index nonzeros() const { return dynamic; }
src/sparsecore/sparsecompressedbase.h:56: inline index nonzeros() const
src/sparsecore/sparsemap.h:87: inline index nonzeros() const { return m_zero_nnz[1]; }
src/sparsecore/sparsetranspose.h:31: inline index nonzeros() const { return derived().nestedexpression().nonzeros(); }
src/sparsecore/sparsevector.h:140: inline index nonzeros() const { return m_data.size(); }


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