File-Backed Matrix Class with Convenient Read and Write Access R package filematrix version 1.3 Interface for working with large matrices stored in files, not in computer memory. Supports multiple non-character data types (double, integer, logical and raw) of various sizes (e.g. 8 and 4 byte real values). Access to parts of the matrix is done by indexing, exactly as with usual R matrices. Supports very large matrices. Tested on multi-terabyte matrices. Allows for more than 2^32 rows or columns. Allows for quick addition of extra columns to a filematrix. Cross-platform as the package has R code only. Software Depends: methods, utils Suggests: knitr, rmarkdown, RSQLite Andrey A Shabalin <andrey.shabalin@gmail.com> Comprehensive R Archive Network (CRAN) Andrey A Shabalin [aut, cre] (ORCID: <https://orcid.org/0000-0003-0309-6821>) LGPL-3 2018-02-27 application/tgz https://CRAN.R-project.org/package=filematrix doi:10.32614/CRAN.package.filematrix