npm package: @stdlib/lapack-base-dladiv
Description: LAPACK routine to divide two double-precision complex floating-point numbers in real arithmetic.
Author: The Stdlib Authors
Latest version: 0.1.1

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# dladiv

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

> Divide two double-precision complex floating-point numbers in real arithmetic.

<section class="installation">

## Installation

```bash
npm install @stdlib/lapack-base-dladiv
```

</section>

<section class="usage">

## Usage

```javascript
var dladiv = require( '@stdlib/lapack-base-dladiv' );
```

#### dladiv( a, b, c, d, P, Q )

Divides two double-precision complex floating-point numbers in real arithmetic.

```javascript
var Float64Array = require( '@stdlib/array-float64' );

var P = new Float64Array( 1 );
var Q = new Float64Array( 1 );

dladiv( -13.0, -1.0, -2.0, 1.0, P, Q );
// P => <Float64Array>[ 5.0 ]
// Q => <Float64Array>[ 3.0 ]
```

The function has the following parameters:

-   **a**: real component of numerator.
-   **b**: imaginary component of numerator.
-   **c**: real component of denominator.
-   **d**: imaginary component of denominator.
-   **P**: [`Float64Array`][mdn-float64array] containing a single element which is overwritten by the real part of the quotient.
-   **Q**: [`Float64Array`][mdn-float64array] containing a single element which is overwritten by the imaginary part of the quotient.

#### dladiv.ndarray( a, b, c, d, P, offsetP, Q, offsetQ )

Divides two double-precision complex floating-point numbers in real arithmetic using alternative indexing semantics.

```javascript
var Float64Array = require( '@stdlib/array-float64' );

var P = new Float64Array( 1 );
var Q = new Float64Array( 1 );

dladiv.ndarray( -13.0, -1.0, -2.0, 1.0, P, 0, Q, 0 );
// P => <Float64Array>[ 5.0 ]
// Q => <Float64Array>[ 3.0 ]
```

The function has the following parameters:

-   **a**: real component of numerator.
-   **b**: imaginary component of numerator.
-   **c**: real component of denominator.
-   **d**: imaginary component of denominator.
-   **P**: [`Float64Array`][mdn-float64array] containing an element which is overwritten by the real part of the quotient.
-   **offsetP**: index of the element in `P`.
-   **Q**: [`Float64Array`][mdn-float64array] containing an element which is overwritten by the imaginary part of the quotient.
-   **offsetQ**: index of the element in `Q`.

While [`typed array`][mdn-typed-array] views mandate a view offset based on the underlying buffer, the offset parameters support indexing semantics based on starting indices. For example,

```javascript
var Float64Array = require( '@stdlib/array-float64' );

var P = new Float64Array( [ 0.0, 0.0, 0.0 ] );
var Q = new Float64Array( [ 0.0, 0.0, 0.0 ] );

dladiv.ndarray( 2.0, 1.0, 3.0, 4.0, P, 1, Q, 2 );
// P => <Float64Array>[ 0.0, 0.4, 0.0 ]
// Q => <Float64Array>[ 0.0, 0.0, -0.2 ]
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   `dladiv()` corresponds to the [LAPACK][LAPACK] function [`dladiv`][lapack-dladiv].

</section>

<!-- /.notes -->

<section class="examples">

## Examples

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

```javascript
var Float64Array = require( '@stdlib/array-float64' );
var dladiv = require( '@stdlib/lapack-base-dladiv' );

var P = new Float64Array( 1 );
var Q = new Float64Array( 1 );
dladiv( 2.0, 1.0, 3.0, 4.0, P, Q );
console.log( '(2+i)/(3+4i) =', P[ 0 ], '+', Q[ 0 ], 'i' );
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->

<section class="intro">

</section>

<!-- /.intro -->

<!-- C usage documentation. -->

<section class="usage">

### Usage

```c
TODO
```

#### TODO

TODO.

```c
TODO
```

TODO

```c
TODO
```

</section>

<!-- /.usage -->

<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

</section>

<!-- /.notes -->

<!-- C API usage examples. -->

<section class="examples">

### Examples

```c
TODO
```

</section>

<!-- /.examples -->

</section>

<!-- /.c -->

<!-- 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="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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---

## License

See [LICENSE][stdlib-license].


## Copyright

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

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[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/lapack-base-dladiv/main/LICENSE

[mdn-typed-array]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray

[lapack-dladiv]: https://www.netlib.org/lapack/explore-html/d5/db7/group__ladiv_gacbc97eb1922a833ffe257e1731bb0aaa.html

[mdn-float64array]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float64Array

[lapack]: https://www.netlib.org/lapack/explore-html/

</section>

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