Skip to content

Latest commit

 

History

History
295 lines (186 loc) · 11 KB

README.md

File metadata and controls

295 lines (186 loc) · 11 KB
Raw
About stdlib...

We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.

The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.

When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.

To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!

zeroToLike

NPM version Build Status Coverage Status

Generate a linearly spaced numeric array whose elements increment by 1 starting from zero and having the same length and data type as a provided input array.

Usage

To use in Observable,

zeroToLike = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/array-zero-to-like@umd/browser.js' )

To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:

var zeroToLike = require( 'path/to/vendor/umd/array-zero-to-like/index.js' )

To include the bundle in a webpage,

<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/array-zero-to-like@umd/browser.js"></script>

If no recognized module system is present, access bundle contents via the global scope:

<script type="text/javascript">
(function () {
    window.zeroToLike;
})();
</script>

zeroToLike( x[, dtype] )

Generates a linearly spaced numeric array whose elements increment by 1 starting from zero and having the same length and data type as a provided input array x.

var arr = zeroToLike( [ 0, 0, 0, 0, 0 ] );
// returns [ 0, 1, 2, 3, 4 ]

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 inferred from the provided array x. To return an array having a different data type, provide a dtype argument.

var arr = zeroToLike( [ 0, 0, 0, 0, 0 ], 'int32' );
// returns <Int32Array>[ 0, 1, 2, 3, 4 ]

Notes

  • For complex number arrays, each element of the returned array has an imaginary component equal to 0.

Examples

<!DOCTYPE html>
<html lang="en">
<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/blas-ext-base-gsort2hp@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/random-array-discrete-uniform@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/array-zero-to-like@umd/browser.js"></script>
<script type="text/javascript">
(function () {

// Generate an array of random numbers:
var opts = {
    'dtype': 'generic'
};
var x = discreteUniform( 10, 100, 200, opts );

// Generate an array of indices:
var idx = zeroToLike( x );

// Create a temporary array to avoid mutation:
var tmp = x.slice();

// Sort the index array according to the sort order of `x`:
sort2hp( x.length, 1, tmp, 1, idx, 1 );

console.log( x );
console.log( idx );

})();
</script>
</body>
</html>

See Also

  • @stdlib/array-empty-like: create an uninitialized array having the same length and data type as a provided array.
  • @stdlib/array-full-like: create a filled array having the same length and data type as a provided array.
  • @stdlib/array-nans-like: create an array filled with NaNs and having the same length and data type as a provided array.
  • @stdlib/array-one-to-like: generate a linearly spaced numeric array whose elements increment by 1 starting from one and having the same length and data type as a provided input array.
  • @stdlib/array-ones-like: create an array filled with ones and having the same length and data type as a provided array.
  • @stdlib/array-zero-to: generate a linearly spaced numeric array whose elements increment by 1 starting from zero.
  • @stdlib/array-zeros-like: create a zero-filled array having the same length and data type as a provided array.

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.

Community

Chat

License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.