{ "_id": "6a1f3a70b401979e73428fb1", "Package": "MatrixExtra", "Type": "Package", "Title": "Extra Methods for Sparse Matrices", "Version": "0.1.15", "Authors@R": "c(\nperson(given=\"David\", family=\"Cortes\", role=c(\"aut\", \"cre\", \"cph\"),\nemail=\"david.cortes.rivera@gmail.com\"),\nperson(given=\"Dmitry\", family=\"Selivanov\", role=\"cph\"),\nperson(given=\"Thibaut\", family=\"Goetghebuer-Planchon\", role=\"cph\",\ncomment=\"Copyright holder of included robinmap library\"),\nperson(given=\"Martin\", family=\"Maechler\", role=\"cph\",\ncomment=\"Copyright holder of 'Matrix' package from which some code was taken\"),\nperson(given=\"Robert\", family=\"Gentleman\", role=\"cph\",\ncomment=\"Copyright holder of mathematical functions used by base R which were copied\"),\nperson(given=\"Ross\", family=\"Ihaka\", role=\"cph\",\ncomment=\"Copyright holder of mathematical functions used by base R which were copied\")\n)", "Maintainer": "David Cortes ", "Description": "Extends sparse matrix and vector classes from the 'Matrix'\npackage by providing: (a) Methods and operators that work\nnatively on CSR formats (compressed sparse row, a.k.a.\n'RsparseMatrix') such as slicing/sub-setting, assignment,\nrbind(), mathematical operators for CSR and COO such as\naddition (\"+\") or sqrt(), and methods such as diag(); (b)\nMulti-threaded matrix multiplication and cross-product for many\n types, including the 'float32' type from\n'float'; (c) Coercion methods between pairs of classes which\nare not present in 'Matrix', such as 'dgCMatrix' ->\n'ngRMatrix', as well as convenience conversion functions; (d)\nUtility functions for sparse matrices such as sorting the\nindices or removing zero-valued entries; (e) Fast transposes\nthat work by outputting in the opposite storage format; (f)\nFaster replacements for many 'Matrix' methods for all sparse\ntypes, such as slicing and elementwise multiplication. 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"headings": [ "Sparse Matrix Formats", "1. COO (coordinate) or triplets, a.k.a. \"TsparseMatrix\":", "2. CSR (compressed sparse row), a.k.a. \"RsparseMatrix\"", "3. CSC (compressed sparse column), a.k.a. \"CsparseMatrix\"", "4. 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