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!
Compute the hyperbolic arctangent of a number.
npm install @stdlib/math-base-special-fast-atanh
var atanh = require( '@stdlib/math-base-special-fast-atanh' );
Computes the hyperbolic arctangent of a number
(in radians).
var v = atanh( 0.0 );
// returns 0.0
v = atanh( -0.0 );
// returns -0.0
v = atanh( 0.5 );
// returns ~0.549
v = atanh( 0.9 );
// returns ~1.472
v = atanh( 1.0 );
// returns Infinity
v = atanh( -1.0 );
// returns -Infinity
The domain of x
is restricted to [-1,1]
. If |x| > 1
, the function returns NaN
.
var v = atanh( -3.14 );
// returns NaN
-
For small
x
, the function will underflow.var v = atanh( 1.0e-17 ); // returns 0.0 // (expected 1.0e-17)
var linspace = require( '@stdlib/array-base-linspace' );
var atanh = require( '@stdlib/math-base-special-fast-atanh' );
var x = linspace( -1.0, 1.0, 103 );
var i;
for ( i = 0; i < x.length; i++ ) {
console.log( atanh( x[ i ] ) );
}
#include "stdlib/math/base/special/fast/atanh.h"
Computes the hyperbolic arctangent of a double-precision floating-point number (in radians).
double out = stdlib_base_fast_atanh( 0.0 );
// returns 0.0
out = stdlib_base_fast_atanh( -0.0 );
// returns -0.0
The function accepts the following arguments:
-
x:
[in] double
input value.
double stdlib_base_fast_atanh( const double x );
#include "stdlib/math/base/special/fast/atanh.h"
#include <stdio.h>
int main( void ) {
const double x[] = { -1.0, -0.78, -0.56, -0.33, -0.11, 0.11, 0.33, 0.56, 0.78, 1.0 };
double v;
int i;
for ( i = 0; i < 10; i++ ) {
v = stdlib_base_fast_atanh( x[ i ] );
printf( "atanh(%lf) = %lf\n", x[ i ], v );
}
}
-
@stdlib/math-base/special/atanh
: compute the hyperbolic arctangent of a double-precision floating-point number.
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.
See LICENSE.
Copyright © 2016-2024. The Stdlib Authors.