# @stdlib/array-ones

0.2.1 • Public • Published

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# ones

Create an array filled with ones and having a specified length.

## Installation

`npm install @stdlib/array-ones`

## Usage

`var ones = require( '@stdlib/array-ones' );`

#### ones( length[, dtype] )

Creates an array filled with ones and having a specified length.

```var arr = ones( 2 );
// returns <Float64Array>[ 1.0, 1.0 ]```

The function recognizes the following data types:

• `float64`: double-precision floating-point numbers (IEEE 754)
• `float32`: single-precision floating-point numbers (IEEE 754)
• `complex128`: double-precision complex floating-point numbers
• `complex64`: single-precision complex floating-point numbers
• `int32`: 32-bit two's complement signed integers
• `uint32`: 32-bit unsigned integers
• `int16`: 16-bit two's complement signed integers
• `uint16`: 16-bit unsigned integers
• `int8`: 8-bit two's complement signed integers
• `uint8`: 8-bit unsigned integers
• `uint8c`: 8-bit unsigned integers clamped to `0-255`
• `generic`: generic JavaScript values

By default, the output array data type is `float64` (i.e., a typed array). To specify an alternative data type, provide a `dtype` argument.

```var arr = ones( 2, 'int32' );
// returns <Int32Array>[ 1, 1 ]```

## Notes

• For complex number arrays, each entry of the returned array has a real component equal to `1` and an imaginary component equal to `0`.

## Examples

```var dtypes = require( '@stdlib/array-dtypes' );
var ones = require( '@stdlib/array-ones' );

// Get a list of array data types:
var dt = dtypes();

// Generate filled arrays...
var arr;
var i;
for ( i = 0; i < dt.length; i++ ) {
arr = ones( 4, dt[ i ] );
console.log( arr );
}```

## Notice

This package is part of 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, see the main project repository.

## Package Sidebar

### Install

`npm i @stdlib/array-ones`

### Repository

github.com/stdlib-js/array-ones

stdlib.io

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