https://github.com/stdlib-js/datasets-herndon-venus-semidiameters
Fifteen observations of the vertical semidiameter of Venus, made by Lieutenant Herndon, with the meridian circle at Washington, in the year 1846.
https://github.com/stdlib-js/datasets-herndon-venus-semidiameters
astronomy data dataset datasets grubbs herndon javascript node node-js nodejs outlier outliers sample statistics stats stdlib venus
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Fifteen observations of the vertical semidiameter of Venus, made by Lieutenant Herndon, with the meridian circle at Washington, in the year 1846.
- Host: GitHub
- URL: https://github.com/stdlib-js/datasets-herndon-venus-semidiameters
- Owner: stdlib-js
- License: other
- Created: 2021-06-14T13:15:53.000Z (about 5 years ago)
- Default Branch: main
- Last Pushed: 2025-08-04T00:51:12.000Z (11 months ago)
- Last Synced: 2025-10-05T14:05:02.800Z (9 months ago)
- Topics: astronomy, data, dataset, datasets, grubbs, herndon, javascript, node, node-js, nodejs, outlier, outliers, sample, statistics, stats, stdlib, venus
- Language: JavaScript
- Homepage: https://github.com/stdlib-js/stdlib
- Size: 353 KB
- Stars: 1
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
- Citation: CITATION.cff
- Security: SECURITY.md
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README
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# Venus Semidiameters
[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]
> Fifteen observations of the vertical semidiameter of Venus, made by Lieutenant Herndon, with the meridian circle at Washington, in the year 1846.
Herndon's observations are a classic dataset commonly used in examples demonstrating outlier detection.
## Installation
```bash
npm install @stdlib/datasets-herndon-venus-semidiameters
```
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]).
- To use as a general utility for the command line, install the corresponding [CLI package][cli-section] globally.
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 data = require( '@stdlib/datasets-herndon-venus-semidiameters' );
```
#### data()
Returns fifteen observations of the vertical semidiameter of Venus, made by Lieutenant Herndon, with the meridian circle at Washington, in the year 1846.
```javascript
var d = data();
// returns [ -0.30, -0.44, ..., 0.39, 0.10 ]
```
## Examples
```javascript
var incrgrubbs = require( '@stdlib/stats-incr-grubbs' );
var data = require( '@stdlib/datasets-herndon-venus-semidiameters' );
var opts;
var acc;
var d;
var i;
// Get the data:
d = data();
// Create a new accumulator for detecting an outlier using Grubbs' test:
opts = {
'init': d.length
};
acc = incrgrubbs( opts );
// Update the accumulator...
for ( i = 0; i < d.length; i++ ) {
acc( d[ i ] );
}
// Print the test results:
console.log( acc().print() );
```
* * *
## CLI
## Installation
To use as a general utility, install the CLI package globally
```bash
npm install -g @stdlib/datasets-herndon-venus-semidiameters-cli
```
### Usage
```text
Usage: herndon-venus-semidiameters [options]
Options:
-h, --help Print this message.
-V, --version Print the package version.
```
### Notes
- Data is written to `stdout` as newline-delimited data.
### Examples
```bash
$ herndon-venus-semidiameters
-0.30
-0.44
1.01
0.48
-0.24
0.06
0.63
-0.13
-1.40
-0.22
-0.05
0.20
0.18
0.39
0.10
```
* * *
## References
- Chauvenet, William. 1868. _A Manual of Spherical and Practical Astronomy_. 5th ed. Vol. 5. London, England: Trübner & Co.
- Grubbs, Frank E. 1950. "Sample Criteria for Testing Outlying Observations." _The Annals of Mathematical Statistics_ 21 (1). The Institute of Mathematical Statistics: 27–58. doi:[10.1214/aoms/1177729885][@grubbs:1950a].
- Grubbs, Frank E. 1969. "Procedures for Detecting Outlying Observations in Samples." _Technometrics_ 11 (1). Taylor & Francis: 1–21. doi:[10.1080/00401706.1969.10490657][@grubbs:1969a].
- Tietjen, Gary L., and Roger H. Moore. 1972. "Some Grubbs-Type Statistics for the Detection of Several Outliers." _Technometrics_ 14 (3). Taylor & Francis: 583–97. doi:[10.1080/00401706.1972.10488948][@tietjen:1972a].
## License
The data files (databases) are licensed under an [Open Data Commons Public Domain Dedication & License 1.0][pddl-1.0] and their contents are licensed under [Creative Commons Zero v1.0 Universal][cc0]. The software is licensed under [Apache License, Version 2.0][apache-license].
* * *
## 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]
---
## Copyright
Copyright © 2016-2025. The Stdlib [Authors][stdlib-authors].
[npm-image]: http://img.shields.io/npm/v/@stdlib/datasets-herndon-venus-semidiameters.svg
[npm-url]: https://npmjs.org/package/@stdlib/datasets-herndon-venus-semidiameters
[test-image]: https://github.com/stdlib-js/datasets-herndon-venus-semidiameters/actions/workflows/test.yml/badge.svg?branch=main
[test-url]: https://github.com/stdlib-js/datasets-herndon-venus-semidiameters/actions/workflows/test.yml?query=branch:main
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/datasets-herndon-venus-semidiameters/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/datasets-herndon-venus-semidiameters?branch=main
[chat-image]: https://img.shields.io/gitter/room/stdlib-js/stdlib.svg
[chat-url]: https://app.gitter.im/#/room/#stdlib-js_stdlib:gitter.im
[stdlib]: https://github.com/stdlib-js/stdlib
[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors
[cli-section]: https://github.com/stdlib-js/datasets-herndon-venus-semidiameters#cli
[cli-url]: https://github.com/stdlib-js/datasets-herndon-venus-semidiameters/tree/cli
[@stdlib/datasets-herndon-venus-semidiameters]: https://github.com/stdlib-js/datasets-herndon-venus-semidiameters/tree/main
[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules
[deno-url]: https://github.com/stdlib-js/datasets-herndon-venus-semidiameters/tree/deno
[deno-readme]: https://github.com/stdlib-js/datasets-herndon-venus-semidiameters/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/datasets-herndon-venus-semidiameters/tree/umd
[umd-readme]: https://github.com/stdlib-js/datasets-herndon-venus-semidiameters/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/datasets-herndon-venus-semidiameters/tree/esm
[esm-readme]: https://github.com/stdlib-js/datasets-herndon-venus-semidiameters/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/datasets-herndon-venus-semidiameters/blob/main/branches.md
[pddl-1.0]: http://opendatacommons.org/licenses/pddl/1.0/
[cc0]: https://creativecommons.org/publicdomain/zero/1.0
[apache-license]: https://www.apache.org/licenses/LICENSE-2.0
[@grubbs:1950a]: https://doi.org/10.1214/aoms/1177729885
[@grubbs:1969a]: https://doi.org/10.1080/00401706.1969.10490657
[@tietjen:1972a]: https://doi.org/10.1080/00401706.1972.10488948