Extends sparse matrix and vector classes from the 'Matrix' package by providing: (a) Methods and operators that work natively on CSR formats (compressed sparse row, a.k.a. 'RsparseMatrix') such as slicing/subsetting, assignment, rbind(), mathematical operators for CSR and COO such as addition ("+") or sqrt(), and methods such as diag(); (b) Multithreaded matrix multiplication and crossproduct for many <sparse, dense> types, including the 'float32' type from 'float'; (c) Coercion methods between pairs of classes which are not present in 'Matrix', such as 'dgCMatrix' > 'ngRMatrix', as well as convenience conversion functions; (d) Utility functions for sparse matrices such as sorting the indices or removing zerovalued entries; (e) Fast transposes that work by outputting in the opposite storage format; (f) Faster replacements for many 'Matrix' methods for all sparse types, such as slicing and elementwise multiplication. (g) Convenience functions for sparse objects, such as 'mapSparse' or a shorter 'show' method.
Package details 


Author  David Cortes [aut, cre, cph], Dmitry Selivanov [cph], Thibaut GoetghebuerPlanchon [cph] (Copyright holder of included robinmap library), Martin Maechler [cph] (Copyright holder of 'Matrix' package from which some code was taken) 
Maintainer  David Cortes <david.cortes.rivera@gmail.com> 
License  GPL (>= 2) 
Version  0.1.8 
URL  https://github.com/davidcortes/MatrixExtra 
Package repository  View on CRAN 
Installation 
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