@turf/sample

sample

Takes a [FeatureCollection][1] and returns a FeatureCollection with given number of [features][2] at random.

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* fc [FeatureCollection][1]\
* num [number][3] number of features to select
* featurecollection [FeatureCollection][1] set of input features

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``javascript
var points = turf.randomPoint(100, {bbox: [-80, 30, -60, 60]});

var sample = turf.sample(points, 5);

//addToMap
var addToMap = [points, sample]
turf.featureEach(sample, function (currentFeature) {
currentFeature.properties['marker-size'] = 'large';
currentFeature.properties['marker-color'] = '#000';
});
`

Returns [FeatureCollection][1] a FeatureCollection with n features

[1]: https://tools.ietf.org/html/rfc7946#section-3.3

[2]: https://tools.ietf.org/html/rfc7946#section-3.2

[3]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number

---

This module is part of the Turfjs project, an open source module collection dedicated to geographic algorithms. It is maintained in the Turfjs/turf repository, where you can create PRs and issues.

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Install this single module individually:

`sh
$ npm install @turf/sample
`

Or install the all-encompassing @turf/turf module that includes all modules as functions:

`sh
$ npm install @turf/turf
``