Top "Sparse-matrix" questions

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

Reverse sort and argsort in python

I'm trying to write a function in Python (still a noob!) which returns indices and scores of documents ordered by …

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Multiplying Numpy/Scipy Sparse and Dense Matrices Efficiently

I'm working to implement the following equation: X =(Y.T * Y + Y.T * C * Y) ^ -1 Y is a (n …

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R error in glmnet: NA/NaN/Inf in foreign function call

I am trying to create a model using glmnet, (currently using cv to find the lambda value) and I am …

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Is there support for sparse matrices in Python?

Is there support for sparse matrices in python? Possibly in numpy or in scipy?

python numpy scipy sparse-matrix
What is meant by sparse data/ datastore/ database?

Have been reading up on Hadoop and HBase lately, and came across this term- HBase is an open-source, distributed, sparse, …

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Building and updating a sparse matrix in python using scipy

I'm trying to build and update a sparse matrix as I read data from file. The matrix is of size 100000…

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Is there an efficient way of concatenating scipy.sparse matrices?

I'm working with some rather large sparse matrices (from 5000x5000 to 20000x20000) and need to find an efficient way to …

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How expensive is it to compute the eigenvalues of a matrix?

How expensive is it to compute the eigenvalues of a matrix? What is the complexity of the best algorithms? How …

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Fast sparse matrix multiplication

for class I have to write my own linear equation solver for sparse matrices. I am free to use any …

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Concatenate sparse matrices in Python using SciPy/Numpy

What would be the most efficient way to concatenate sparse matrices in Python using SciPy/Numpy? Here I used the …

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