From cb3bd1a82c26ea6294253ddb8690018cada144c9 Mon Sep 17 00:00:00 2001 From: Philipp Burckhardt Date: Wed, 26 Aug 2026 11:46:00 -0500 Subject: [PATCH 1/5] feat: add C implementation for `stats/base/dists/gamma/quantile` This commit adds a native C implementation for the gamma distribution quantile function. The implementation delegates to `gammaincinv` which already has C support. --- ## AI Assistance Disclosure This commit was drafted with the help of AI (Claude). A human reviewed and approved all changes before merging. Co-Authored-By: Claude Opus 5 (1M context) --- type: pre_commit_static_analysis_report description: Results of running static analysis checks when committing changes. report: - task: lint_filenames status: passed - task: lint_editorconfig status: passed - task: lint_markdown_pkg_readmes status: na - task: lint_markdown_docs status: na - task: lint_markdown status: na - task: lint_package_json status: passed - task: lint_repl_help status: na - task: lint_javascript_src status: passed - task: lint_javascript_cli status: na - task: lint_javascript_examples status: na - task: lint_javascript_tests status: passed - task: lint_javascript_benchmarks status: passed - task: lint_python status: na - task: lint_r status: na - task: lint_c_src status: passed - task: lint_c_examples status: passed - task: lint_c_benchmarks status: passed - task: lint_c_tests_fixtures status: na - task: lint_shell status: na - task: lint_typescript_declarations status: passed - task: lint_typescript_tests status: na - task: lint_license_headers status: passed --- --- .../stats/base/dists/gamma/quantile/README.md | 85 ++++++++ .../quantile/benchmark/benchmark.native.js | 73 +++++++ .../dists/gamma/quantile/benchmark/c/Makefile | 146 +++++++++++++ .../gamma/quantile/benchmark/c/benchmark.c | 142 +++++++++++++ .../base/dists/gamma/quantile/binding.gyp | 170 +++++++++++++++ .../dists/gamma/quantile/examples/c/Makefile | 146 +++++++++++++ .../dists/gamma/quantile/examples/c/example.c | 42 ++++ .../base/dists/gamma/quantile/include.gypi | 53 +++++ .../stdlib/stats/base/dists/gamma/quantile.h | 38 ++++ .../base/dists/gamma/quantile/lib/native.js | 72 +++++++ .../base/dists/gamma/quantile/manifest.json | 79 +++++++ .../base/dists/gamma/quantile/package.json | 3 + .../base/dists/gamma/quantile/src/Makefile | 70 +++++++ .../base/dists/gamma/quantile/src/addon.c | 22 ++ .../base/dists/gamma/quantile/src/main.c | 52 +++++ .../dists/gamma/quantile/test/test.native.js | 193 ++++++++++++++++++ 16 files changed, 1386 insertions(+) create mode 100644 lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/benchmark/benchmark.native.js create mode 100644 lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/benchmark/c/Makefile create mode 100644 lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/benchmark/c/benchmark.c create mode 100644 lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/binding.gyp create mode 100644 lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/examples/c/Makefile create mode 100644 lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/examples/c/example.c create mode 100644 lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/include.gypi create mode 100644 lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/include/stdlib/stats/base/dists/gamma/quantile.h create mode 100644 lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/lib/native.js create mode 100644 lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/manifest.json create mode 100644 lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/src/Makefile create mode 100644 lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/src/addon.c create mode 100644 lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/src/main.c create mode 100644 lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/test/test.native.js diff --git a/lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/README.md b/lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/README.md index 0887619f47db..abb513815569 100644 --- a/lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/README.md +++ b/lib/node_modules/@stdlib/stats/base/dists/gamma/quantile/README.md @@ -150,6 +150,91 @@ logEachMap( 'p: %0.4f, α: %0.4f, β: %0.4f, Q(p;α,β): %0.4f', p, alpha, beta, + + +
+ +
+ +
+ + + +
+ +## C APIs + +### Usage + +```c +#include "stdlib/stats/base/dists/gamma/quantile.h" +``` + +#### stdlib_base_dists_gamma_quantile( p, alpha, beta ) + +Evaluates the [quantile function][quantile-function] for a [gamma][gamma-distribution] distribution with parameters `alpha` (shape parameter) and `beta` (rate parameter). + +```c +double out = stdlib_base_dists_gamma_quantile( 0.8, 2.0, 1.0 ); +// returns ~2.994 + +out = stdlib_base_dists_gamma_quantile( 0.5, 4.0, 2.0 ); +// returns ~1.836 +``` + +The function accepts the following arguments: + +- **p**: `[in] double` input probability. +- **alpha**: `[in] double` shape parameter. +- **beta**: `[in] double` rate parameter. + +```c +double stdlib_base_dists_gamma_quantile( const double p, const double alpha, const double beta ); +``` + +
+ + + +
+ +### Examples + +```c +#include "stdlib/stats/base/dists/gamma/quantile.h" +#include +#include + +static double random_uniform( double min, double max ) { + double scale = rand() / (double) RAND_MAX; + return min + ( scale * ( max - min ) ); +} + +int main( void ) { + double alpha; + double beta; + double p; + double y; + int i; + + for ( i = 0; i < 25; i++ ) { + p = random_uniform( 0.0, 1.0 ); + alpha = random_uniform( 0.1, 5.0 ); + beta = random_uniform( 0.1, 5.0 ); + y = stdlib_base_dists_gamma_quantile( p, alpha, beta ); + printf( "p: %lf, α: %lf, β: %lf, Q(p;α,β): %lf\n", p, alpha, beta, y ); + } +} +``` + +
+ + + +
+ + +