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<h1 id="function-setmultiplicity">Function setMultiplicity <a href="#function-setmultiplicity" title="Permalink">#</a></h1>

Count the multiplicity of an element in a multiset.
A multi-dimension array will be converted to a single-dimension array before the operation.


<h2 id="syntax">Syntax <a href="#syntax" title="Permalink">#</a></h2>

```js
math.setMultiplicity(element, set)
```

<h3 id="parameters">Parameters <a href="#parameters" title="Permalink">#</a></h3>

Parameter | Type | Description
--------- | ---- | -----------
`e` | number &#124; BigNumber &#124; Fraction &#124; Complex | An element in the multiset
`a` | Array &#124; Matrix | A multiset

<h3 id="returns">Returns <a href="#returns" title="Permalink">#</a></h3>

Type | Description
---- | -----------
number | The number of how many times the multiset contains the element


<h3 id="throws">Throws <a href="#throws" title="Permalink">#</a></h3>

Type | Description
---- | -----------


<h2 id="examples">Examples <a href="#examples" title="Permalink">#</a></h2>

```js
math.setMultiplicity(1, [1, 2, 2, 4])    // returns 1
math.setMultiplicity(2, [1, 2, 2, 4])    // returns 2
```


<h2 id="see-also">See also <a href="#see-also" title="Permalink">#</a></h2>

[setDistinct](setDistinct.html),
[setSize](setSize.html)