{"id":15555154,"url":"https://github.com/psolymos/mefa4","last_synced_at":"2026-01-07T22:49:31.578Z","repository":{"id":22159123,"uuid":"25490592","full_name":"psolymos/mefa4","owner":"psolymos","description":"R package for multivariate data handling with S4 classes and sparse matrices","archived":false,"fork":false,"pushed_at":"2024-09-24T01:04:30.000Z","size":7345,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-03-02T07:33:26.634Z","etag":null,"topics":["cran","data-manipulation","ecology","r","sparse-matrices"],"latest_commit_sha":null,"homepage":"https://peter.solymos.org/mefa4/","language":"R","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/psolymos.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2014-10-20T23:04:39.000Z","updated_at":"2024-09-24T01:01:55.000Z","dependencies_parsed_at":"2023-01-13T21:52:52.956Z","dependency_job_id":null,"html_url":"https://github.com/psolymos/mefa4","commit_stats":null,"previous_names":[],"tags_count":3,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/psolymos%2Fmefa4","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/psolymos%2Fmefa4/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/psolymos%2Fmefa4/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/psolymos%2Fmefa4/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/psolymos","download_url":"https://codeload.github.com/psolymos/mefa4/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":242218480,"owners_count":20091426,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["cran","data-manipulation","ecology","r","sparse-matrices"],"created_at":"2024-10-02T15:07:01.815Z","updated_at":"2026-01-07T22:49:31.547Z","avatar_url":"https://github.com/psolymos.png","language":"R","funding_links":[],"categories":[],"sub_categories":[],"readme":"# mefa4: multivariate data handling with S4 classes and sparse matrices\n\n[![CRAN version](https://www.r-pkg.org/badges/version/mefa4)](https://CRAN.R-project.org/package=mefa4)\n[![CRAN RStudio mirror downloads](https://cranlogs.r-pkg.org/badges/grand-total/mefa4)](https://CRAN.R-project.org/package=mefa4)\n[![check](https://github.com/psolymos/mefa4/actions/workflows/check.yml/badge.svg)](https://github.com/psolymos/mefa4/actions/workflows/check.yml)\n\nAn S4 update of the mefa package using sparse matrices for enhanced efficiency.\nSparse array-like objects are supported via lists of sparse matrices.\n\n* Main functions: `Xtab`, `Mefa`.\n* Accessor and replacement functions: `xtab`, `samp`, `taxa`.\n* Methods: `mbind`, `groupSums`, `groupMeans`.\n\nSee tutorial with design decisions and performance comparisons ([Rmd](https://github.com/psolymos/mefa4/blob/master/extras/mefa4.Rmd), [PDF](https://github.com/psolymos/mefa4/raw/master/extras/mefa4.pdf))\n\n## Versions\n\nInstall CRAN version as:\n\n```R\ninstall.packages(\"mefa4\")\n```\n\nInstall development version from GitHub:\n\n```R\nlibrary(devtools)\ninstall_github(\"psolymos/mefa4\")\n```\n\nUser visible changes are listed in the [NEWS](https://github.com/psolymos/mefa4/blob/master/NEWS.md) file.\n\nPreviously hosted at [R-Forge](https://r-forge.r-project.org/projects/mefa/) (until rev 619).\n\n## Report a problem\n\nUse the [issue tracker](https://github.com/psolymos/mefa4/issues)\nto report a problem.\n\n## License\n\n[GPL-2](https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html)\n\n## References\n\nSolymos P. 2008. mefa: an R package for handling and reporting count data.\n_Community Ecology_ **9**, 125-127. ([PDF](https://drive.google.com/file/d/0B-q59n6LIwYPdWVkWlQ1ZzFMS3c/view?usp=sharing))\n\nSolymos P. 2009. Processing ecological data in R with the mefa package.\n_Journal of Statistical Software_ **29(8)**, 1-28.\nDOI: [10.18637/jss.v029.i08](https://doi.org/10.18637/jss.v029.i08)\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fpsolymos%2Fmefa4","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fpsolymos%2Fmefa4","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fpsolymos%2Fmefa4/lists"}