Top "Sparse-matrix" questions

A sparse matrix is a data structure in which not every entry is explicitly represented.

How can I calculate inverse of sparse matrix in Eigen library

I have a question about Eigen library in C++. Actually, I want to calculate inverse matrix of sparse matrix. When …

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The fastest way to calculate eigenvalues of large matrices

Until now I used numpy.linalg.eigvals to calculate the eigenvalues of quadratic matrices with at least 1000 rows/columns and, …

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Eigen convert dense matrix to sparse one

How to convert an Eigen::Matrix<double,Dynamic,Dynamic> to an Eigen::SparseMatrix<double> ? I'm looking …

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Most mature sparse matrix package for R?

There are at least two sparse matrix packages for R. I'm looking into these because I'm working with datasets that …

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Scipy sparse CSR matrix to TensorFlow SparseTensor - Mini-Batch gradient descent

I have a Scipy sparse CSR matrix created from sparse TF-IDF feature matrix in SVM-Light format. The number of features …

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SVD for sparse matrix in R

I've got a sparse Matrix in R that's apparently too big for me to run as.matrix() on (though it's …

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Efficient way to solve for X in AX=B in MATLAB when both A and B are big matrices

I have this problem which requires solving for X in AX=B. A is of the order 15000 x 15000 and is …

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sparse matrix svd in python

Does anyone know how to perform svd operation on a sparse matrix in python? It seems that there is no …

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Improving Performance of Multiplication of Scipy Sparse Matrices

Given a Scipy CSC Sparse matrix "sm" with dimensions (170k x 170k) with 440 million non-null points and a sparse CSC …

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python - how to check if matrix is sparse or not

I have a matrix and I want to check if it is sparse or not. Things I have tried: isinstance …

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