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# sasum

> Calculate the sum of absolute values for all elements in a one-dimensional single-precision floating-point ndarray.

<section class="intro">

The [_L1_ norm][l1norm] is defined as

<!-- <equation class="equation" label="eq:l1norm" align="center" raw="\|\mathbf{x}\|_1 = \sum_{i=0}^{n-1} \vert x_i \vert" alt="L1 norm definition."> -->

<div class="equation" align="center" data-raw-text="\|\mathbf{x}\|_1 = \sum_{i=0}^{n-1} \vert x_i \vert" data-equation="eq:l1norm">
    <img src="https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@c403cb0cbb15d9b7b453e3cea34ca2379500ddd4/lib/node_modules/@stdlib/blas/base/sasum/docs/img/equation_l1norm.svg" alt="L1 norm definition.">
    <br>
</div>

<!-- </equation> -->

</section>

<!-- /.intro -->

<section class="usage">

## Usage

```javascript
var sasum = require( '@stdlib/blas/base/ndarray/sasum' );
```

#### sasum( arrays )

Computes the sum of absolute values for all elements in a one-dimensional single-precision floating-point ndarray.

```javascript
var Float32Vector = require( '@stdlib/ndarray/vector/float32' );

var x = new Float32Vector( [ 1.0, -2.0, 3.0, -4.0, 5.0 ] );

var y = sasum( [ x ] );
// returns 15.0
```

The function has the following parameters:

-   **arrays**: array-like object containing a one-dimensional input ndarray.

</section>

<!-- /.usage -->

<section class="notes">

</section>

<!-- /.notes -->

<section class="examples">

## Examples

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

```javascript
var discreteUniform = require( '@stdlib/random/discrete-uniform' );
var ndarray2array = require( '@stdlib/ndarray/to-array' );
var sasum = require( '@stdlib/blas/base/ndarray/sasum' );

var opts = {
    'dtype': 'float32'
};

var x = discreteUniform( [ 10 ], -500, 500, opts );
console.log( ndarray2array( x ) );

var out = sasum( [ x ] );
console.log( out );
```

</section>

<!-- /.examples -->

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

<section class="related">

</section>

<!-- /.related -->

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<section class="links">

[l1norm]: https://en.wikipedia.org/wiki/Norm_%28mathematics%29

</section>

<!-- /.links -->
