npm package: @stdlib/blas-base-diagonal-types
Description: BLAS diagonal element types.
Author: The Stdlib Authors
Latest version: 0.0.3

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# Diagonal Element Types

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

> BLAS diagonal element types.

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</section>

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<section class="installation">

## Installation

```bash
npm install @stdlib/blas-base-diagonal-types
```

</section>

<section class="usage">

## Usage

```javascript
var diagonalTypes = require( '@stdlib/blas-base-diagonal-types' );
```

#### diagonalTypes()

Returns a list of BLAS diagonal element types.

```javascript
var out = diagonalTypes();
// e.g., returns [ 'non-unit', 'unit' ]
```

The output array contains the following types:

-   `non-unit`: elements along a diagonal are **not** all equal to one.
-   `unit`: elements along a diagonal are all equal to one.

</section>

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<section class="notes">

</section>

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<section class="examples">

## Examples

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

```javascript
var contains = require( '@stdlib/array-base-assert-contains' ).factory;
var diagonalTypes = require( '@stdlib/blas-base-diagonal-types' );

var isDiagonalType = contains( diagonalTypes() );

var bool = isDiagonalType( 'non-unit' );
// returns true

bool = isDiagonalType( 'unit' );
// returns true

bool = isDiagonalType( 'beep' );
// returns false
```

</section>

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* * *

<section class="c">

## C APIs

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### Usage

```c
#include "stdlib/blas/base/diagonal_types.h"
```

#### STDLIB_BLAS_DIAGONAL_TYPE

An enumeration of BLAS diagonal element types with the following fields:

-   **STDLIB_BLAS_NON_UNIT_DIAGONAL**: elements along a diagonal are **not** all equal to one.
-   **STDLIB_BLAS_UNIT_DIAGONAL**: elements along a diagonal are all equal to one.

```c
#include "stdlib/blas/base/diagonal_types.h"

const enum STDLIB_BLAS_DIAGONAL_TYPE v = STDLIB_BLAS_UNIT_DIAGONAL;
```

</section>

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<section class="notes">

### Notes

-   Enumeration constants should be considered opaque values, and one should **not** rely on specific integer values.

</section>

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* * *

## 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].

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---

## License

See [LICENSE][stdlib-license].


## Copyright

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

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