@stdlib/stats-base-dists-triangular-ctor

Triangular distribution constructor.

https://github.com/stdlib-js/stats-base-dists-triangular-ctor

Science Score: 44.0%

This score indicates how likely this project is to be science-related based on various indicators:

✓
CITATION.cff file
Found CITATION.cff file
✓
codemeta.json file
Found codemeta.json file
✓
.zenodo.json file
Found .zenodo.json file
○
DOI references
○
Academic publication links
○
Committers with academic emails
○
Institutional organization owner
○
JOSS paper metadata
○
Scientific vocabulary similarity
Low similarity (15.9%) to scientific vocabulary

Keywords

cdf class constructor ctor dist distribution javascript node node-js nodejs object pdf prob probability properties quantile statistics stats stdlib triangular

Last synced: 4 months ago · JSON representation ·

Repository

Triangular distribution constructor.

Basic Info

Host: GitHub
Owner: stdlib-js
License: apache-2.0
Language: JavaScript
Default Branch: main
Homepage: https://github.com/stdlib-js/stdlib
Size: 1.9 MB

Statistics

Stars: 2
Watchers: 3
Forks: 0
Open Issues: 0
Releases: 0

Topics

cdf class constructor ctor dist distribution javascript node node-js nodejs object pdf prob probability properties quantile statistics stats stdlib triangular

Created over 4 years ago · Last pushed 6 months ago

Metadata Files

Readme Changelog Contributing License Code of conduct Citation Security

We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.

The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.

When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.

To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!

Triangular

Triangular distribution constructor.

## Installation ```bash npm install @stdlib/stats-base-dists-triangular-ctor ``` Alternatively, - To load the package in a website via a `script` tag without installation and bundlers, use the [ES Module][es-module] available on the [`esm`][esm-url] branch (see [README][esm-readme]). - If you are using Deno, visit the [`deno`][deno-url] branch (see [README][deno-readme] for usage intructions). - For use in Observable, or in browser/node environments, use the [Universal Module Definition (UMD)][umd] build available on the [`umd`][umd-url] branch (see [README][umd-readme]). The [branches.md][branches-url] file summarizes the available branches and displays a diagram illustrating their relationships. To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

## Usage ```javascript var Triangular = require( '@stdlib/stats-base-dists-triangular-ctor' ); ``` #### Triangular( \[a, b, c] ) Returns a [triangular][triangular-distribution] distribution object. ```javascript var triangular = new Triangular(); var mu = triangular.mean; // returns 0.5 ``` By default, `a = 0.0`, `b = 1.0`, and `c = 0.5`. To create a distribution having a different `a` (minimum support), `b` (maximum support), and `c` (mode), provide the corresponding arguments. ```javascript var triangular = new Triangular( 2.0, 4.0, 3.5 ); var mu = triangular.mean; // returns ~3.167 ``` * * * ## triangular An [triangular][triangular-distribution] distribution object has the following properties and methods... ### Writable Properties #### triangular.a Minimum support of the distribution. `a` **must** be a number smaller than or equal to `b` and `c`. ```javascript var triangular = new Triangular(); var a = triangular.a; // returns 0.0 triangular.a = 0.5; a = triangular.a; // returns 0.5 ``` #### triangular.b Maximum support of the distribution. `b` **must** be a number larger than or equal to `a` and `c`. ```javascript var triangular = new Triangular( 2.0, 4.0, 2.5 ); var b = triangular.b; // returns 4.0 triangular.b = 3.0; b = triangular.b; // returns 3.0 ``` #### triangular.c Mode of the distribution. `c` **must** be a number larger than or equal to `a` and smaller than or equal to `b`. ```javascript var triangular = new Triangular( 2.0, 5.0, 4.0 ); var c = triangular.c; // returns 4.0 triangular.c = 3.0; c = triangular.c; // returns 3.0 ``` * * * ### Computed Properties #### Triangular.prototype.entropy Returns the [differential entropy][entropy]. ```javascript var triangular = new Triangular( 4.0, 12.0, 10.0 ); var entropy = triangular.entropy; // returns ~1.886 ``` #### Triangular.prototype.kurtosis Returns the [excess kurtosis][kurtosis]. ```javascript var triangular = new Triangular( 4.0, 12.0, 10.0 ); var kurtosis = triangular.kurtosis; // returns -0.6 ``` #### Triangular.prototype.mean Returns the [expected value][expected-value]. ```javascript var triangular = new Triangular( 4.0, 12.0, 10.0 ); var mu = triangular.mean; // returns ~8.667 ``` #### Triangular.prototype.median Returns the [median][median]. ```javascript var triangular = new Triangular( 4.0, 12.0, 10.0 ); var median = triangular.median; // returns ~8.899 ``` #### Triangular.prototype.mode Returns the [mode][mode]. ```javascript var triangular = new Triangular( 4.0, 12.0, 10.0 ); var mode = triangular.mode; // returns 10.0 ``` #### Triangular.prototype.skewness Returns the [skewness][skewness]. ```javascript var triangular = new Triangular( 4.0, 12.0, 10.0 ); var skewness = triangular.skewness; // returns ~-0.422 ``` #### Triangular.prototype.stdev Returns the [standard deviation][standard-deviation]. ```javascript var triangular = new Triangular( 4.0, 12.0, 10.0 ); var s = triangular.stdev; // returns ~1.7 ``` #### Triangular.prototype.variance Returns the [variance][variance]. ```javascript var triangular = new Triangular( 4.0, 12.0, 10.0 ); var s2 = triangular.variance; // returns ~2.889 ``` * * * ### Methods #### Triangular.prototype.cdf( x ) Evaluates the [cumulative distribution function][cdf] (CDF). ```javascript var triangular = new Triangular( 2.0, 4.0, 3.0 ); var y = triangular.cdf( 2.5 ); // returns 0.125 ``` #### Triangular.prototype.logcdf( x ) Evaluates the natural logarithm of the [cumulative distribution function][cdf] (CDF). ```javascript var triangular = new Triangular( 2.0, 4.0, 3.0 ); var y = triangular.logcdf( 2.5 ); // returns ~-2.079 ``` #### Triangular.prototype.logpdf( x ) Evaluates the natural logarithm of the [probability density function][pdf] (PDF). ```javascript var triangular = new Triangular( 2.0, 4.0, 3.0 ); var y = triangular.logpdf( 2.5 ); // returns ~-0.693 ``` #### Triangular.prototype.pdf( x ) Evaluates the [probability density function][pdf] (PDF). ```javascript var triangular = new Triangular( 2.0, 4.0, 3.0 ); var y = triangular.pdf( 2.5 ); // returns 0.5 ``` #### Triangular.prototype.quantile( p ) Evaluates the [quantile function][quantile-function] at probability `p`. ```javascript var triangular = new Triangular( 2.0, 4.0, 3.0 ); var y = triangular.quantile( 0.5 ); // returns 3.0 y = triangular.quantile( 1.9 ); // returns NaN ```

## Examples ```javascript var Triangular = require( '@stdlib/stats-base-dists-triangular-ctor' ); var triangular = new Triangular( 2.0, 4.0, 3.0 ); var mu = triangular.mean; // returns 3.0 var median = triangular.median; // returns 3.0 var s2 = triangular.variance; // returns ~0.167 var y = triangular.cdf( 2.5 ); // returns 0.125 ```

* * * ## Notice This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more. For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib]. #### Community [![Chat][chat-image]][chat-url] --- ## License See [LICENSE][stdlib-license]. ## Copyright Copyright © 2016-2025. The Stdlib [Authors][stdlib-authors].

Owner

Name: stdlib
Login: stdlib-js
Kind: organization

Website: https://stdlib.io
Twitter: stdlibjs
Repositories: 3,692
Profile: https://github.com/stdlib-js

Standard library for JavaScript.

Citation (CITATION.cff)

cff-version: 1.2.0
title: stdlib
message: >-
  If you use this software, please cite it using the
  metadata from this file.

type: software

authors:
  - name: The Stdlib Authors
    url: https://github.com/stdlib-js/stdlib/graphs/contributors

repository-code: https://github.com/stdlib-js/stdlib
url: https://stdlib.io

abstract: |
  Standard library for JavaScript and Node.js.

keywords:
  - JavaScript
  - Node.js
  - TypeScript
  - standard library
  - scientific computing
  - numerical computing
  - statistical computing

license: Apache-2.0 AND BSL-1.0

date-released: 2016

GitHub Events

Total

Push event: 32

Last Year

Push event: 32

Committers

Last synced: almost 2 years ago

All Time

Total Commits: 47
Total Committers: 1
Avg Commits per committer: 47.0
Development Distribution Score (DDS): 0.0

Past Year

Commits: 13
Committers: 1
Avg Commits per committer: 13.0
Development Distribution Score (DDS): 0.0

Top Committers

Name	Email	Commits
stdlib-bot	n**y@s**o	47

Committer Domains (Top 20 + Academic)

stdlib.io: 1

Issues and Pull Requests

Last synced: 5 months ago

All Time

Total issues: 0
Total pull requests: 0
Average time to close issues: N/A
Average time to close pull requests: N/A
Total issue authors: 0
Total pull request authors: 0
Average comments per issue: 0
Average comments per pull request: 0
Merged pull requests: 0
Bot issues: 0
Bot pull requests: 0

Past Year

Issues: 0
Pull requests: 0
Average time to close issues: N/A
Average time to close pull requests: N/A
Issue authors: 0
Pull request authors: 0
Average comments per issue: 0
Average comments per pull request: 0
Merged pull requests: 0
Bot issues: 0
Bot pull requests: 0

View more stats

Top Authors

Issue Authors

Pull Request Authors

Top Labels

Issue Labels

Pull Request Labels

Packages

Total packages: 1
Total downloads:
- npm 223 last-month

Total dependent packages: 5
Total dependent repositories: 3
Total versions: 12
Total maintainers: 4

npmjs.org: @stdlib/stats-base-dists-triangular-ctor

Triangular distribution constructor.

Homepage: https://stdlib.io
License: Apache-2.0
Latest release: 0.2.2
published over 1 year ago

Versions: 12
Dependent Packages: 5
Dependent Repositories: 3
Downloads: 223 Last month

Rankings

Dependent packages count: 3.7%

Dependent repos count: 6.4%

Downloads: 6.9%

Average: 9.4%

Stargazers count: 14.5%

Forks count: 15.4%

Maintainers (4)

planeshifter rreusser stdlib-bot kgryte

Funding

type: opencollective
url: https://opencollective.com/stdlib

Last synced: 5 months ago

Dependencies

package.json npm

@stdlib/assert-has-own-property ^0.0.x development
@stdlib/assert-is-function ^0.0.x development
@stdlib/bench ^0.0.x development
@stdlib/constants-float64-eps ^0.0.x development
@stdlib/random-base-randu ^0.0.x development
istanbul ^0.4.1 development
tap-spec 5.x.x development
tape git+https://github.com/kgryte/tape.git#fix/globby development
@stdlib/assert-is-number ^0.0.x
@stdlib/math-base-assert-is-nan ^0.0.x
@stdlib/stats-base-dists-triangular-cdf ^0.0.x
@stdlib/stats-base-dists-triangular-entropy ^0.0.x
@stdlib/stats-base-dists-triangular-kurtosis ^0.0.x
@stdlib/stats-base-dists-triangular-logcdf ^0.0.x
@stdlib/stats-base-dists-triangular-logpdf ^0.0.x
@stdlib/stats-base-dists-triangular-mean ^0.0.x
@stdlib/stats-base-dists-triangular-median ^0.0.x
@stdlib/stats-base-dists-triangular-mgf ^0.0.x
@stdlib/stats-base-dists-triangular-mode ^0.0.x
@stdlib/stats-base-dists-triangular-pdf ^0.0.x
@stdlib/stats-base-dists-triangular-quantile ^0.0.x
@stdlib/stats-base-dists-triangular-skewness ^0.0.x
@stdlib/stats-base-dists-triangular-stdev ^0.0.x
@stdlib/stats-base-dists-triangular-variance ^0.0.x
@stdlib/string-format ^0.0.x
@stdlib/utils-define-nonenumerable-read-only-accessor ^0.0.x
@stdlib/utils-define-nonenumerable-read-only-property ^0.0.x
@stdlib/utils-define-property ^0.0.x

.github/workflows/benchmark.yml actions

actions/checkout v3 composite
actions/setup-node v3 composite

.github/workflows/cancel.yml actions

styfle/cancel-workflow-action 0.11.0 composite

.github/workflows/close_pull_requests.yml actions

superbrothers/close-pull-request v3 composite

.github/workflows/examples.yml actions

actions/checkout v3 composite
actions/setup-node v3 composite

.github/workflows/npm_downloads.yml actions

actions/checkout v3 composite
actions/setup-node v3 composite
actions/upload-artifact v3 composite
distributhor/workflow-webhook v3 composite

.github/workflows/productionize.yml actions

act10ns/slack v1 composite
actions/checkout v3 composite
actions/setup-node v3 composite
stdlib-js/bundle-action main composite
stdlib-js/transform-errors-action main composite

.github/workflows/publish.yml actions

JS-DevTools/npm-publish v1 composite
act10ns/slack v1 composite
actions/checkout v3 composite
actions/setup-node v3 composite
styfle/cancel-workflow-action 0.11.0 composite

.github/workflows/test.yml actions

act10ns/slack v1 composite
actions/checkout v3 composite
actions/setup-node v3 composite

.github/workflows/test_bundles.yml actions

act10ns/slack v1 composite
actions/checkout v3 composite
actions/setup-node v3 composite
denoland/setup-deno v1 composite

.github/workflows/test_coverage.yml actions

act10ns/slack v1 composite
actions/checkout v3 composite
actions/setup-node v3 composite
codecov/codecov-action v3 composite
distributhor/workflow-webhook v3 composite

.github/workflows/test_install.yml actions

act10ns/slack v1 composite
actions/checkout v3 composite
actions/setup-node v3 composite

@stdlib/stats-base-dists-triangular-ctor

Science Score: 44.0%

Keywords

Repository

Basic Info

Statistics

Topics

Metadata Files

README.md

Triangular

Owner

Citation (CITATION.cff)

GitHub Events

Total

Last Year

Committers

All Time

Past Year

Top Committers

Committer Domains (Top 20 + Academic)

Issues and Pull Requests

All Time

Past Year

Top Authors

Issue Authors

Pull Request Authors

Top Labels

Issue Labels

Pull Request Labels

Packages

npmjs.org: @stdlib/stats-base-dists-triangular-ctor

Rankings

Maintainers (4)

Funding

Dependencies