{"id":29053077,"url":"https://github.com/daqana/dqrng","last_synced_at":"2025-06-27T01:03:20.204Z","repository":{"id":52291418,"uuid":"130111537","full_name":"daqana/dqrng","owner":"daqana","description":"Fast Pseudo Random Number Generators for R","archived":false,"fork":false,"pushed_at":"2024-04-13T22:35:43.000Z","size":4526,"stargazers_count":33,"open_issues_count":17,"forks_count":8,"subscribers_count":7,"default_branch":"main","last_synced_at":"2024-04-14T10:44:37.744Z","etag":null,"topics":["cran","r","r-package","random","random-distributions","random-generation","random-sampling","rng"],"latest_commit_sha":null,"homepage":"https://daqana.github.io/dqrng/","language":"C++","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"other","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/daqana.png","metadata":{"files":{"readme":"README.Rmd","changelog":null,"contributing":null,"funding":null,"license":"LICENSE.note","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null}},"created_at":"2018-04-18T19:23:54.000Z","updated_at":"2024-04-15T10:47:31.045Z","dependencies_parsed_at":"2024-01-20T19:21:09.219Z","dependency_job_id":"327006f7-4e56-48c7-b255-db420d94dcd6","html_url":"https://github.com/daqana/dqrng","commit_stats":{"total_commits":190,"total_committers":9,"mean_commits":21.11111111111111,"dds":0.368421052631579,"last_synced_commit":"cd8bfa8823c1f89b8cf7c189d628816fa361b971"},"previous_names":[],"tags_count":11,"template":false,"template_full_name":null,"purl":"pkg:github/daqana/dqrng","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/daqana%2Fdqrng","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/daqana%2Fdqrng/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/daqana%2Fdqrng/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/daqana%2Fdqrng/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/daqana","download_url":"https://codeload.github.com/daqana/dqrng/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/daqana%2Fdqrng/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":262170228,"owners_count":23269604,"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","r","r-package","random","random-distributions","random-generation","random-sampling","rng"],"created_at":"2025-06-27T01:01:30.326Z","updated_at":"2025-06-27T01:03:20.178Z","avatar_url":"https://github.com/daqana.png","language":"C++","funding_links":[],"categories":[],"sub_categories":[],"readme":"---\noutput:\n  github_document\n---\n\n\u003c!-- README.md is generated from README.Rmd. Please edit that file --\u003e\n\n```{r, echo = FALSE}\nknitr::opts_chunk$set(\n  collapse = TRUE,\n  comment = \"#\u003e\",\n  fig.path = \"README-\"\n)\n```\n\n  [![R build status](https://github.com/daqana/dqrng/workflows/R-CMD-check/badge.svg)](https://github.com/daqana/dqrng/actions)\n[![CRAN status](https://www.r-pkg.org/badges/version/dqrng)](https://cran.r-project.org/package=dqrng)\n[![dqrng status badge](https://rstub.r-universe.dev/badges/dqrng)](https://rstub.r-universe.dev/dqrng)\n[![Coverage status](https://codecov.io/gh/daqana/dqrng/branch/main/graph/badge.svg)](https://app.codecov.io/github/daqana/dqrng?branch=main)\n[![Downloads](https://cranlogs.r-pkg.org/badges/dqrng?color=brightgreen)](https://www.r-pkg.org/pkg/dqrng)\n[![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/2157/badge)](https://bestpractices.coreinfrastructure.org/projects/2157)\n[![Dependencies](https://tinyverse.netlify.app/badge/dqrng)](https://cran.r-project.org/package=dqrng)\n\n# dqrng\n\nThe dqrng package provides fast random number generators (RNG) with good statistical properties for usage with R.\nIt combines these RNGs with fast distribution functions to sample from uniform, normal or exponential distributions.\nBoth the RNGs and the distribution functions are distributed as C++ header-only library.\n\n## Installation\n\nThe currently released version is available from CRAN via\n\n```r\ninstall.packages(\"dqrng\")\n```\n\nIntermediate releases can also be obtained via\n[r-universe](https://rstub.r-universe.dev/dqrng):\n\n```r\ninstall.packages('dqrng', repos = c(\n  rstub = 'https://rstub.r-universe.dev',\n  CRAN = 'https://cloud.r-project.org'))\n```\n\n## Example\n\nUsing the provided RNGs from R is deliberately similar to using R's build-in RNGs:\n\n```{r example}\nlibrary(dqrng)\ndqset.seed(42)\ndqrunif(5, min = 2, max = 10)\ndqrexp(5, rate = 4)\n```\n\nThey are quite a bit faster, though:\n\n```{r performance}\nN \u003c- 1e4\nbm \u003c- bench::mark(rnorm(N), dqrnorm(N), check = FALSE)\nbm[, 1:4]\n```\n\nThis is also true for the provided sampling functions with replacement:\n\n```{r sampling1}\nm \u003c- 1e7\nn \u003c- 1e5\nbm \u003c- bench::mark(sample.int(m, n, replace = TRUE),\n                  sample.int(1e3*m, n, replace = TRUE),\n                  dqsample.int(m, n, replace = TRUE),\n                  dqsample.int(1e3*m, n, replace = TRUE),\n                  check = FALSE)\nbm[, 1:4]\n```\n\nAnd without replacement:\n\n```{r sampling2}\nbm \u003c- bench::mark(sample.int(m, n),\n                  sample.int(1e3*m, n),\n                  sample.int(m, n, useHash = TRUE),\n                  dqsample.int(m, n),\n                  dqsample.int(1e3*m, n),\n                  check = FALSE)\nbm[, 1:4]\n```\n\nNote that sampling from `10^10` elements triggers \"long-vector support\" in R.\n\nIn addition the RNGs provide support for multiple independent streams for parallel usage:\n\n```{r parallel}\nN \u003c- 1e7\ndqset.seed(42, 1)\nu1 \u003c- dqrunif(N)\ndqset.seed(42, 2)\nu2 \u003c- dqrunif(N)\ncor(u1, u2)\n```\n\nIt is also possible to register the supplied generators as user-supplied RNGs. This way `set.seed()` and `dqset.seed()` influence both `(dq)runif` and `(dq)rnorm` in the same way. This is also true for other `r\u003cdist\u003e` functions, but note that `rexp` and `dqrexp` still give different results: \n\n```{r register}\nregister_methods()\nset.seed(4711); runif(5)\nset.seed(4711); dqrunif(5)\ndqset.seed(4711); rnorm(5)\ndqset.seed(4711); dqrnorm(5)\nset.seed(4711); rt(5, 10)\ndqset.seed(4711); rt(5, 10)\nset.seed(4711); rexp(5, 10)\nset.seed(4711); dqrexp(5, 10)\nrestore_methods()\n```\n\n## Feedback\n\nAll feedback (bug reports, security issues, feature requests, ...) should be provided as [issues](https://github.com/daqana/dqrng/issues).\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdaqana%2Fdqrng","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdaqana%2Fdqrng","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdaqana%2Fdqrng/lists"}