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mexSparseLogical0Di​ag

version 1.0.0.0 (2.01 KB) by Guy
Change all the elements on the main diagonal of a logical sparse matrix to 0.

301 Downloads

Updated 27 Aug 2009

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Because of memory constraints, it is often impossible to change by subscript all the elements of a large sparse matrix to zero. This leads to changing the elements in a loop, which is horrendously slow.
This mex solves that problem.
Usage: B = mexSparseLogical0Diag(A).

This problem is very common when dealing with adjacency matrices used in clustering - an adjacency matrix is a logical matrix, where the main diagonal is all zeros (no element is a neighbour of itself).

Cite As

Guy (2022). mexSparseLogical0Diag (https://www.mathworks.com/matlabcentral/fileexchange/25147-mexsparselogical0diag), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2009a
Compatible with any release
Platform Compatibility
Windows macOS Linux
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