npm package: @stdlib/datasets-liu-negative-opinion-words-en
Description: A list of negative opinion words.
Author: The Stdlib Authors
Latest version: 0.2.3

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</details>

# Negative Opinion Words

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> A [list][sentiment-lexicon] of negative opinion words.

<section class="installation">

## Installation

```bash
npm install @stdlib/datasets-liu-negative-opinion-words-en
```

</section>

<section class="usage">

## Usage

```javascript
var words = require( '@stdlib/datasets-liu-negative-opinion-words-en' );
```

#### words()

Returns a [list][sentiment-lexicon] of negative opinion words.

```javascript
var list = words();
/* returns
    [
        '2-faced',
        '2-faces',
        'abnormal',
        'abolish',
        'abominable',
        'abominably',
        'abominate',
        'abomination',
        'abort',
        'aborted',
        'aborts',
        'abrade',
        'abrasive',
        ...
    ]
*/
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   A word's appearance in a sentence does **not** necessarily imply a positive or negative opinion. See [Liu (2010)](#references).
-   The list includes misspelled words. Their presence is intentional, as such misspellings frequently occur in social media content.

</section>

<!-- /.notes -->

<section class="examples">

<!-- TODO: more creative example; possibly counting the number of negative words per sentence in two pieces of text. -->

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var floor = require( '@stdlib/math-base-special-floor' );
var randu = require( '@stdlib/random-base-randu' );
var words = require( '@stdlib/datasets-liu-negative-opinion-words-en' );

var list = words();
var len = list.length;
var idx;
var i;

// Select random words from the list...
for ( i = 0; i < 100; i++ ) {
    idx = floor( randu()*len );
    console.log( list[ idx ] );
}
```

</section>

<!-- /.examples -->



* * *

<section class="references">

## References

-   Hu, Minqing, and Bing Liu. 2004. "Mining and Summarizing Customer Reviews." In _Proceedings of the Tenth Acm Sigkdd International Conference on Knowledge Discovery and Data Mining_, 168–77. KDD '04. New York, NY, USA: ACM. doi:[10.1145/1014052.1014073][@hu:2004a].
-   Liu, Bing, Minqing Hu, and Junsheng Cheng. 2005. "Opinion Observer: Analyzing and Comparing Opinions on the Web." In _Proceedings of the 14th International Conference on World Wide Web_, 342–51. WWW '05. New York, NY, USA: ACM. doi:[10.1145/1060745.1060797][@liu:2005a].
-   Liu, Bing. 2010. "Sentiment Analysis and Subjectivity." In _Handbook of Natural Language Processing_, edited by Nitin Indurkhya and Fred J. Damerau, 2nd ed., 627–66. Chapman & Hall/CRC. <https://www.crcpress.com/Handbook-of-Natural-Language-Processing-Second-Edition/Indurkhya-Damerau/p/book/9781420085921>.

</section>

<!-- /.references -->

<!-- <license> -->

## License

The data files (databases) are licensed under an [Open Data Commons Attribution 1.0 License][odc-by-1.0] and their contents are licensed under a [Creative Commons Attribution 4.0 International Public License][cc-by-4.0]. The original dataset is attributed to Bing Liu and Minqing Hu and can be found [here][sentiment-lexicon]. The software is licensed under [Apache License, Version 2.0][apache-license].

<!-- </license> -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

## See Also

-   <span class="package-name">[`@stdlib/datasets-liu-negative-opinion-words-en-cli`][@stdlib/datasets-liu-negative-opinion-words-en-cli]</span><span class="delimiter">: </span><span class="description">CLI package for use as a command-line utility.</span>
-   <span class="package-name">[`@stdlib/datasets-liu-positive-opinion-words-en`][@stdlib/datasets/liu-positive-opinion-words-en]</span><span class="delimiter">: </span><span class="description">A list of positive opinion words.</span>

</section>

<!-- /.related -->

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<section class="main-repo" >

* * *

## 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

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---

## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

</section>

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[sentiment-lexicon]: http://www.cs.uic.edu/~liub/FBS/sentiment-analysis.html#lexicon

[odc-by-1.0]: http://opendatacommons.org/licenses/by/1.0/

[cc-by-4.0]: http://creativecommons.org/licenses/by/4.0/

[apache-license]: https://www.apache.org/licenses/LICENSE-2.0

[@hu:2004a]: https://doi.org/10.1145/1014052.1014073

[@liu:2005a]: https://doi.org/10.1145/1060745.1060797

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[@stdlib/datasets/liu-positive-opinion-words-en]: https://www.npmjs.com/package/@stdlib/datasets-liu-positive-opinion-words-en

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