{"id":3302,"date":"2017-05-23T18:08:27","date_gmt":"2017-05-23T16:08:27","guid":{"rendered":"https:\/\/geekosas.com\/?p=3302"},"modified":"2026-05-23T18:08:52","modified_gmt":"2026-05-23T16:08:52","slug":"sparse-matrix-in-r","status":"publish","type":"post","link":"https:\/\/geekosas.com\/index.php\/2017\/05\/23\/sparse-matrix-in-r\/","title":{"rendered":"Sparse Matrix in R"},"content":{"rendered":"

The values 0 in matrices are very frequent, especially in dummy variables, so in R there is a package called Matrix which allows creating sparse matrices, in other words, matrices that do not use memory when an element’s value is 0.<\/p>\n

But skipping the zeros is computationally complex, so it is not always convenient to use sparse matrices. This is shown in the following results where different measurements were made:
\nMemory Usage<\/strong><\/p>\n

\"\"<\/p>\n

Time in M^2<\/strong><\/p>\n

\"\"<\/p>\n

SVD Decomposition<\/strong><\/p>\n

\"\"<\/p>\n

As you can see, in general it is advisable to use sparse matrices from 40% zeros; before that, it will only use more memory and more CPU.<\/p>\n

The code used for the experiment is at: https:\/\/github.com\/danielfm123\/R_matrix_benchmark<\/a><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

The values 0 in matrices are very frequent, especially in dummy variables, so in R there is a package called Matrix which allows creating sparse […]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":2217,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[],"class_list":["post-3302","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sin-categoria"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/geekosas.com\/wp-content\/uploads\/2017\/10\/matrix.png?fit=345%2C190&ssl=1","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p8vjqF-Rg","jetpack-related-posts":[{"id":3304,"url":"https:\/\/geekosas.com\/index.php\/2017\/05\/23\/r-vs-ms-open-r-2\/","url_meta":{"origin":3302,"position":0},"title":"R vs MS open R","author":"Daniel Fischer","date":"2017-05-23","format":false,"excerpt":"Microsoft has realized the power of R, so it has integrated it into its systems, including Power BI and SQL Server 2017. Microsoft released a free version of R with some improvements, including native SQL Server connection, package versioning in MRAN (Microsoft Cran), and optimizations in the linear algebra package.\u2026","rel":"","context":"In "Sin categor\u00eda"","block_context":{"text":"Sin categor\u00eda","link":"https:\/\/geekosas.com\/index.php\/category\/sin-categoria\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.geekosas.com\/wp-content\/uploads\/2017\/10\/lm-1024x932.png?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.geekosas.com\/wp-content\/uploads\/2017\/10\/lm-1024x932.png?resize=350%2C200 1x, https:\/\/i0.wp.com\/www.geekosas.com\/wp-content\/uploads\/2017\/10\/lm-1024x932.png?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.geekosas.com\/wp-content\/uploads\/2017\/10\/lm-1024x932.png?resize=700%2C400 2x"},"classes":[]},{"id":3337,"url":"https:\/\/geekosas.com\/index.php\/2019\/05\/23\/r-and-super-powerful-pcs\/","url_meta":{"origin":3302,"position":1},"title":"R and super-powerful PCs","author":"Daniel Fischer","date":"2019-05-23","format":false,"excerpt":"R and Python are very popular lately, but have you asked yourself if you are getting the most out of these languages? 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Unsupervised models: Dimensionality Reduction (PCA) -> Applied example of replicating\u2026","rel":"","context":"In "Sin categor\u00eda"","block_context":{"text":"Sin categor\u00eda","link":"https:\/\/geekosas.com\/index.php\/category\/sin-categoria\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/geekosas.com\/wp-content\/uploads\/2017\/09\/Rprogramming.jpg?fit=1176%2C664&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/geekosas.com\/wp-content\/uploads\/2017\/09\/Rprogramming.jpg?fit=1176%2C664&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/geekosas.com\/wp-content\/uploads\/2017\/09\/Rprogramming.jpg?fit=1176%2C664&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/geekosas.com\/wp-content\/uploads\/2017\/09\/Rprogramming.jpg?fit=1176%2C664&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/geekosas.com\/wp-content\/uploads\/2017\/09\/Rprogramming.jpg?fit=1176%2C664&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/geekosas.com\/index.php\/wp-json\/wp\/v2\/posts\/3302","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/geekosas.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/geekosas.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/geekosas.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/geekosas.com\/index.php\/wp-json\/wp\/v2\/comments?post=3302"}],"version-history":[{"count":1,"href":"https:\/\/geekosas.com\/index.php\/wp-json\/wp\/v2\/posts\/3302\/revisions"}],"predecessor-version":[{"id":3303,"href":"https:\/\/geekosas.com\/index.php\/wp-json\/wp\/v2\/posts\/3302\/revisions\/3303"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/geekosas.com\/index.php\/wp-json\/wp\/v2\/media\/2217"}],"wp:attachment":[{"href":"https:\/\/geekosas.com\/index.php\/wp-json\/wp\/v2\/media?parent=3302"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/geekosas.com\/index.php\/wp-json\/wp\/v2\/categories?post=3302"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/geekosas.com\/index.php\/wp-json\/wp\/v2\/tags?post=3302"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}