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Author: stdlib-bot

CHANGELOG.md

@@ -248,6 +248,40 @@ This release closes the following issue:
 
 <!-- /.package -->
 
+<section class="package" id="stats-base-dists-betaprime-variance-unreleased">
+
+#### [@stdlib/stats/base/dists/betaprime/variance](https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/stats/base/dists/betaprime/variance)
+
+<details>
+
+<section class="features">
+
+##### Features
+
+-   [`c77a433`](https://github.com/stdlib-js/stdlib/commit/c77a433d6e33ad5f4879d32211d8cfdb4e5fa2c6) - add C implementation for `stats/base/dists/betaprime/variance` [(#3460)](https://github.com/stdlib-js/stdlib/pull/3460)
+
+</section>
+
+<!-- /.features -->
+
+<section class="issues">
+
+##### Closed Issues
+
+This release closes the following issue:
+
+[#3447](https://github.com/stdlib-js/stdlib/issues/3447)
+
+</section>
+
+<!-- /.issues -->
+
+</details>
+
+</section>
+
+<!-- /.package -->
+
 <section class="package" id="stats-base-dists-chisquare-unreleased">
 
 #### [@stdlib/stats/base/dists/chisquare](https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/stats/base/dists/chisquare)
@@ -434,9 +468,9 @@ A total of 3 issues were closed in this release:
 
 ### Closed Issues
 
-A total of 14 issues were closed in this release:
+A total of 15 issues were closed in this release:
 
-[#1619](https://github.com/stdlib-js/stdlib/issues/1619), [#1632](https://github.com/stdlib-js/stdlib/issues/1632), [#1633](https://github.com/stdlib-js/stdlib/issues/1633), [#3236](https://github.com/stdlib-js/stdlib/issues/3236), [#3237](https://github.com/stdlib-js/stdlib/issues/3237), [#3238](https://github.com/stdlib-js/stdlib/issues/3238), [#3378](https://github.com/stdlib-js/stdlib/issues/3378), [#3384](https://github.com/stdlib-js/stdlib/issues/3384), [#3385](https://github.com/stdlib-js/stdlib/issues/3385), [#3401](https://github.com/stdlib-js/stdlib/issues/3401), [#3414](https://github.com/stdlib-js/stdlib/issues/3414), [#3445](https://github.com/stdlib-js/stdlib/issues/3445), [#3446](https://github.com/stdlib-js/stdlib/issues/3446), [#3671](https://github.com/stdlib-js/stdlib/issues/3671)
+[#1619](https://github.com/stdlib-js/stdlib/issues/1619), [#1632](https://github.com/stdlib-js/stdlib/issues/1632), [#1633](https://github.com/stdlib-js/stdlib/issues/1633), [#3236](https://github.com/stdlib-js/stdlib/issues/3236), [#3237](https://github.com/stdlib-js/stdlib/issues/3237), [#3238](https://github.com/stdlib-js/stdlib/issues/3238), [#3378](https://github.com/stdlib-js/stdlib/issues/3378), [#3384](https://github.com/stdlib-js/stdlib/issues/3384), [#3385](https://github.com/stdlib-js/stdlib/issues/3385), [#3401](https://github.com/stdlib-js/stdlib/issues/3401), [#3414](https://github.com/stdlib-js/stdlib/issues/3414), [#3445](https://github.com/stdlib-js/stdlib/issues/3445), [#3446](https://github.com/stdlib-js/stdlib/issues/3446), [#3447](https://github.com/stdlib-js/stdlib/issues/3447), [#3671](https://github.com/stdlib-js/stdlib/issues/3671)
 
 </section>
 
@@ -468,6 +502,7 @@ A total of 9 people contributed to this release. Thank you to the following cont
 
 <details>
 
+-   [`c77a433`](https://github.com/stdlib-js/stdlib/commit/c77a433d6e33ad5f4879d32211d8cfdb4e5fa2c6) - **feat:** add C implementation for `stats/base/dists/betaprime/variance` [(#3460)](https://github.com/stdlib-js/stdlib/pull/3460) _(by Aayush Khanna, Philipp Burckhardt, stdlib-bot)_
 -   [`0fc07d1`](https://github.com/stdlib-js/stdlib/commit/0fc07d1722a3da70464b37d4de5f6a762468f85e) - **feat:** add C implementation for `stats/base/dists/betaprime/skewness` [(#3462)](https://github.com/stdlib-js/stdlib/pull/3462) _(by Aayush Khanna, Philipp Burckhardt, stdlib-bot)_
 -   [`31faa3e`](https://github.com/stdlib-js/stdlib/commit/31faa3e761d92fe94a35d941bed6640380e21b37) - **feat:** add C implementation for `stats/base/dists/arcsine/kurtosis` [(#3388)](https://github.com/stdlib-js/stdlib/pull/3388) _(by Aayush Khanna, Philipp Burckhardt, stdlib-bot)_
 -   [`e9d539e`](https://github.com/stdlib-js/stdlib/commit/e9d539ed6f0185d2455a45b5e29bd50d5c556db5) - **feat:** add C implementation for `stats/base/dists/invgamma/entropy` [(#3682)](https://github.com/stdlib-js/stdlib/pull/3682) _(by Aayush Khanna, Philipp Burckhardt, stdlib-bot)_

base/dists/betaprime/variance/README.md

@@ -147,6 +147,101 @@ 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/betaprime/variance.h"
+```
+
+#### stdlib_base_dists_betaprime_variance( alpha, beta )
+
+Returns the variance of a beta prime distribution.
+
+```c
+double out = stdlib_base_dists_betaprime_variance( 1.0, 3.0 );
+// returns ~0.75
+```
+
+The function accepts the following arguments:
+
+-   **alpha**: `[in] double` first shape parameter.
+-   **beta**: `[in] double` second shape parameter.
+
+```c
+double stdlib_base_dists_betaprime_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/betaprime/variance.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, 20 );
+        beta = random_uniform( 0, 20 ) + 2.0;
+        y = stdlib_base_dists_betaprime_variance( alpha, beta );
+        printf( "α: %lf, β: %lf, Var(X;α,β): %lf", 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">

base/dists/betaprime/variance/benchmark/benchmark.js

@@ -21,6 +21,7 @@
 // MODULES //
 
 var bench = require( '@stdlib/bench' );
+var Float64Array = require( '@stdlib/array/float64' );
 var randu = require( '@stdlib/random/base/randu' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );
 var EPS = require( '@stdlib/constants/float64/eps' );
@@ -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() * 20.0 ) + EPS;
+		beta[ i ] = ( randu() * 20.0 ) + 2.0 + EPS;
+	}
+
 	b.tic();
 	for ( i = 0; i < b.iterations; i++ ) {
-		alpha = ( randu()*10.0 ) + EPS;
-		beta = ( randu()*10.0 ) + 2.0 + EPS;
-		y = variance( alpha, beta );
+		y = variance( alpha[ i % len ], beta[ i % len ] );
 		if ( isnan( y ) ) {
 			b.fail( 'should not return NaN' );
 		}

base/dists/betaprime/variance/benchmark/benchmark.native.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' );
+var Float64Array = require( '@stdlib/array/float64' );
+var tryRequire = require( '@stdlib/utils/try-require' );
+var randu = require( '@stdlib/random/base/randu' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+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() * 20.0 ) + EPS;
+		beta[ i ] = ( randu() * 20.0 ) + 2.0 + 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();
+});