Auto-generated commit

Author: stdlib-bot

.github/.keepalive

@@ -2,6 +2,63 @@
 
 > Package changelog.
 
+<section class="release" id="unreleased">
+
+## Unreleased (2024-12-15)
+
+<section class="features">
+
+### Features
+
+-   [`bb09b18`](https://github.com/stdlib-js/stdlib/commit/bb09b185f74d2fc05254a2f164119ca05054887f) - add C implementation for `stats/base/dists/beta/variance` [(#3919)](https://github.com/stdlib-js/stdlib/pull/3919)
+
+</section>
+
+<!-- /.features -->
+
+<section class="issues">
+
+### Closed Issues
+
+This release closes the following issue:
+
+[#3436](https://github.com/stdlib-js/stdlib/issues/3436)
+
+</section>
+
+<!-- /.issues -->
+
+<section class="commits">
+
+### Commits
+
+<details>
+
+-   [`bb09b18`](https://github.com/stdlib-js/stdlib/commit/bb09b185f74d2fc05254a2f164119ca05054887f) - **feat:** add C implementation for `stats/base/dists/beta/variance` [(#3919)](https://github.com/stdlib-js/stdlib/pull/3919) _(by Vivek maurya, Philipp Burckhardt)_
+
+</details>
+
+</section>
+
+<!-- /.commits -->
+
+<section class="contributors">
+
+### Contributors
+
+A total of 2 people contributed to this release. Thank you to the following contributors:
+
+-   Philipp Burckhardt
+-   Vivek maurya
+
+</section>
+
+<!-- /.contributors -->
+
+</section>
+
+<!-- /.release -->
+
 <section class="release" id="v0.2.2">
 
 ## 0.2.2 (2024-07-26)

CHANGELOG.md

@@ -6,7 +6,8 @@ Aayush Khanna <[email protected]>
 Abhijit Raut <[email protected]>
 Adarsh Palaskar <[email protected]>
 Aditya Sapra <[email protected]>
-AgPriyanshu18 <[email protected]>
+Ahmed Atwa <[email protected]>
+Ahmed Kashkoush <[email protected]>
 Aleksandr <[email protected]>
 Ali Salesi <[email protected]>
 Aman Bhansali <[email protected]>
@@ -51,6 +52,7 @@ Krishnendu Das <[email protected]>
 Kshitij-Dale <[email protected]>
 Lovelin <[email protected]>
 Manik Sharma <[email protected]>
+Manvith M <[email protected]>
 Marcus Fantham <[email protected]>
 Matt Cochrane <[email protected]>
 Mihir Pandit <[email protected]>
@@ -60,32 +62,34 @@ Momtchil Momtchev <[email protected]>
 Muhammad Haris <[email protected]>
 Naresh Jagadeesan <[email protected]>
 Neeraj Pathak <[email protected]>
-NightKnight <Ahmedatwa866@yahoo.com>
+Nishant Shinde <[email protected].com>
 Nithin Katta <[email protected]>
 Nourhan Hasan <[email protected]>
 Ognjen Jevremović <[email protected]>
 Oneday12323 <[email protected]>
+Ori Miles <[email protected]>
 Philipp Burckhardt <[email protected]>
 Prajwal Kulkarni <[email protected]>
 Pranav Goswami <[email protected]>
 Praneki <[email protected]>
 Pratik <[email protected]>
 Pratyush Kumar Chouhan <[email protected]>
 Priyansh <[email protected]>
+Priyanshu Agarwal <[email protected]>
 Pushpendra Chandravanshi <[email protected]>
-RISHAV <[email protected]>
 Raunak Kumar Gupta <[email protected]>
 Rejoan Sardar <[email protected]>
 Ricky Reusser <[email protected]>
 Ridam Garg <[email protected]>
+Rishav <[email protected]>
 Robert Gislason <[email protected]>
 Roman Stetsyk <[email protected]>
-Rutam <[email protected]>
+Rutam Kathale <[email protected]>
 Ruthwik Chikoti <[email protected]>
 Ryan Seal <[email protected]>
 Rylan Yang <[email protected]>
 Sai Srikar Dumpeti <[email protected]>
-SarthakPaandey <[email protected]>
+Sarthak Paandey <[email protected]>
 Saurabh Singh <[email protected]>
 Seyyed Parsa Neshaei <[email protected]>
 Shashank Shekhar Singh <[email protected]>
@@ -98,7 +102,7 @@ Snehil Shah <[email protected]>
 Soumajit Chatterjee <[email protected]>
 Spandan Barve <[email protected]>
 Stephannie Jiménez Gacha <[email protected]>
-Suraj kumar <[email protected]>
+Suraj Kumar <[email protected]>
 Tirtadwipa Manunggal <[email protected]>
 Tudor Pagu <[email protected]>
 Tufailahmed Bargir <[email protected]>
@@ -108,12 +112,11 @@ UtkershBasnet <[email protected]>
 Vaibhav Patel <[email protected]>
 Varad Gupta <[email protected]>
 Vinit Pandit <[email protected]>
+Vivek maurya <[email protected]>
 Xiaochuan Ye <[email protected]>
+Yaswanth Kosuru <[email protected]>
 Yernar Yergaziyev <[email protected]>
 naveen <[email protected]>
-nishant-s7 <[email protected]>
 olenkabilonizhka <[email protected]>
-orimiles5 <[email protected]>
 rainn <[email protected]>
 rei2hu <[email protected]>
-yaswanth <[email protected]>

CONTRIBUTORS

@@ -177,6 +177,101 @@ for ( i = 0; i < 10; i++ ) {
 
 <!-- /.examples -->
 
+<!-- C interface documentation. -->
+
+* * *
+
+<section class="c">
+
+## C APIs
+
+<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
+
+<section class="intro">
+
+</section>
+
+<!-- /.intro -->
+
+<!-- C usage documentation. -->
+
+<section class="usage">
+
+### Usage
+
+```c
+#include "stdlib/stats/base/dists/beta/variance.h"
+```
+
+#### stdlib_base_dists_beta_variance( alpha, beta )
+
+Returns the [variance][variance] of a [beta][beta-distribution] distribution with parameters `alpha` (first shape parameter) and `beta` (second shape parameter).
+
+```c
+double out = stdlib_base_dists_beta_variance( 1.0, 1.0 );
+// returns ~0.083
+```
+
+The function accepts the following arguments:
+
+-   **alpha**: `[in] double` first shape parameter.
+-   **beta**: `[in] double` second shape parameter.
+
+```c
+double stdlib_base_dists_beta_variance( const double alpha, const double beta );
+```
+
+</section>
+
+<!-- /.usage -->
+
+<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+</section>
+
+<!-- /.notes -->
+
+<!-- C API usage examples. -->
+
+<section class="examples">
+
+### Examples
+
+```c
+#include "stdlib/stats/base/dists/beta/variance.h"
+#include "stdlib/constants/float64/eps.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+static double random_uniform( const double min, const double max ) {
+    double v = (double)rand() / ( (double)RAND_MAX + 1.0 );
+    return min + ( v*(max-min) );
+}
+
+int main( void ) {
+    double alpha;
+    double beta;
+    double y;
+    int i;
+    for ( i = 0; i < 25; i++ ) {
+        alpha = random_uniform( 0.0, 10.0 ) + STDLIB_CONSTANT_FLOAT64_EPS;
+        beta = random_uniform( 0.0, 10.0 ) + STDLIB_CONSTANT_FLOAT64_EPS;
+        y = stdlib_base_dists_beta_variance( alpha, beta );
+        printf( "α: %lf, β: %lf, Var(X;α,β): %lf\n", alpha, beta, y );
+    }
+}
+```
+
+</section>
+
+<!-- /.examples -->
+
+</section>
+
+<!-- /.c -->
+
 <!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
 
 <section class="references">

README.md

@@ -22,6 +22,7 @@
 
 var bench = require( '@stdlib/bench-harness' );
 var randu = require( '@stdlib/random-base-randu' );
+var Float64Array = require( '@stdlib/array-float64' );
 var isnan = require( '@stdlib/math-base-assert-is-nan' );
 var EPS = require( '@stdlib/constants-float64-eps' );
 var pkg = require( './../package.json' ).name;
@@ -33,14 +34,21 @@ var variance = require( './../lib' );
 bench( pkg, function benchmark( b ) {
 	var alpha;
 	var beta;
+	var len;
 	var y;
 	var i;
 
+	len = 100;
+	alpha = new Float64Array( len );
+	beta = new Float64Array( len );
+	for ( i = 0; i < len; i++ ) {
+		alpha[ i ] = ( randu()*10.0 ) + EPS;
+		beta[ i ] = ( randu()*10.0 ) + EPS;
+	}
+
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		alpha = ( randu()*10.0 ) + EPS;
-		beta = ( randu()*10.0 ) + EPS;
-		y = variance( alpha, beta );
+		y = variance( alpha[ i % len ], beta[ i % len ] );
 		if ( isnan( y ) ) {
 			b.fail( 'should not return NaN' );
 		}

benchmark/benchmark.js

@@ -0,0 +1,71 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2024 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var resolve = require( 'path' ).resolve;
+var bench = require( '@stdlib/bench-harness' );
+var Float64Array = require( '@stdlib/array-float64' );
+var EPS = require( '@stdlib/constants-float64-eps' );
+var randu = require( '@stdlib/random-base-randu' );
+var isnan = require( '@stdlib/math-base-assert-is-nan' );
+var tryRequire = require( '@stdlib/utils-try-require' );
+var pkg = require( './../package.json' ).name;
+
+
+// VARIABLES //
+
+var variance = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+	'skip': ( variance instanceof Error )
+};
+
+
+// MAIN //
+
+bench( pkg+'::native', opts, function benchmark( b ) {
+	var alpha;
+	var beta;
+	var len;
+	var y;
+	var i;
+
+	len = 100;
+	alpha = new Float64Array( len );
+	beta = new Float64Array( len );
+	for ( i = 0; i < len; i++ ) {
+		alpha[ i ] = ( randu()*10.0 ) + EPS;
+		beta[ i ] = ( randu()*10.0 ) + EPS;
+	}
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		y = variance( alpha[ i % len ], beta[ i % len ] );
+		if ( isnan( y ) ) {
+			b.fail( 'should not return NaN' );
+		}
+	}
+	b.toc();
+	if ( isnan( y ) ) {
+		b.fail( 'should not return NaN' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});