CSparse | cs_add | Math library

 by   ibayer C Version: Current License: No License

kandi X-RAY | CSparse Summary

kandi X-RAY | CSparse Summary

CSparse is a C library typically used in Utilities, Math applications. CSparse has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

cs_add.c add sparse matrices cs_amd.c approximate minimum degree cs_chol.c sparse Cholesky cs_cholsol.c x=A\b using sparse Cholesky cs_compress.c convert a triplet form to compressed-column form cs_counts.c column counts for Cholesky and QR cs_cumsum.c cumulative sum cs_dfs.c depth-first-search cs_dmperm.c Dulmage-Mendelsohn permutation cs_droptol.c drop small entries from a sparse matrix cs_dropzeros.c drop zeros from a sparse matrix cs_dupl.c remove (and sum) duplicates cs_entry.c add an entry to a triplet matrix cs_ereach.c nonzero pattern of Cholesky L(k,:) from etree and triu(A(:,k)) cs_etree.c find elimination tree cs_fkeep.c drop entries from a sparse matrix cs_gaxpy.c sparse matrix times dense matrix cs.h include file for CSparse cs_happly.c apply Householder reflection cs_house.c compute Householder reflection cs_ipvec.c x(p)=b cs_leaf.c determine if j is a leaf of the skeleton matrix and find lca cs_load.c load a sparse matrix from a file cs_lsolve.c x=L\b cs_ltsolve.c x=L'\b cs_lu.c sparse LU factorization cs_lusol.c x=A\b using sparse LU factorization cs_malloc.c memory manager cs_maxtrans.c maximum transveral (permutation for zero-free diagonal) cs_multiply.c sparse matrix multiply cs_norm.c sparse matrix norm cs_permute.c permute a sparse matrix cs_pinv.c invert a permutation vector cs_post.c postorder an elimination tree cs_print.c print a sparse matrix cs_pvec.c x=b(p) cs_qr.c sparse QR cs_qrsol.c solve a least-squares problem cs_randperm.c random permutation cs_reach.c find nonzero pattern of x=L\b for sparse L and b cs_scatter.c scatter a sparse vector cs_scc.c strongly-connected components cs_schol.c symbolic Cholesky cs_spsolve.c x=G\b where G, x, and b are sparse, and G upper/lower triangular cs_sqr.c symbolic QR (also can be used for LU) cs_symperm.c symmetric permutation of a sparse matrix cs_tdfs.c depth-first-search of a tree cs_transpose.c transpose a sparse matrix cs_updown.c sparse rank-1 Cholesky update/downate cs_usolve.c x=U\b cs_util.c various utilities (allocate/free matrices, workspace, etc) cs_utsolve.c x=U'\b Makefile Makefile for CSparse README.txt README file for CSparse.
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            kandi-support Support

              CSparse has a low active ecosystem.
              It has 18 star(s) with 13 fork(s). There are 3 watchers for this library.
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              It had no major release in the last 6 months.
              CSparse has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of CSparse is current.

            kandi-Quality Quality

              CSparse has 0 bugs and 0 code smells.

            kandi-Security Security

              CSparse has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              CSparse code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              CSparse does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
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              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              CSparse releases are not available. You will need to build from source code and install.

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            CSparse Key Features

            No Key Features are available at this moment for CSparse.

            CSparse Examples and Code Snippets

            No Code Snippets are available at this moment for CSparse.

            Community Discussions

            QUESTION

            Eigen: selfadjointView does not work if innerIndexPtr vector is not well ordered
            Asked 2020-Jun-16 at 12:18

            Working on a realtime system, I use low level API to manipulate an Eigen sparse matrix in order to increase performances on a specific problem set. In particular I mix Eigen with a variant of CSparse cs_symperm algorithm to get the permutation of A matrix: Ap = PAP'. cs_symperm use the same low level structure for the sparse matrix but, for a fixed column, row indexes could be not well ordered.

            This is a simple example, built by hand, of what could happen:

            ...

            ANSWER

            Answered 2020-Jun-16 at 12:18

            To sort the entries of a matrix you can transpose it twice:

            Source https://stackoverflow.com/questions/62402460

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install CSparse

            You can download it from GitHub.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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            https://github.com/ibayer/CSparse.git

          • CLI

            gh repo clone ibayer/CSparse

          • sshUrl

            git@github.com:ibayer/CSparse.git

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