@stdlib/math-base-special-rempio2
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Compute
x - nπ/2 = r.
npm install @stdlib/math-base-special-rempio2
var rempio2 = require( '@stdlib/math-base-special-rempio2' );
Computes x - nπ/2 = r.
var y = [ 0.0, 0.0 ];
var n = rempio2( 128.0, y );
// returns 81
var y1 = y[ 0 ];
// returns ~0.765
var y2 = y[ 1 ];
// returns ~3.618e-17
When x is NaN or infinite, the function returns 0 and sets the elements of y to NaN.
var y = [ 0.0, 0.0 ];
var n = rempio2( NaN, y );
// returns 0
var y1 = y[ 0 ];
// returns NaN
var y2 = y[ 1 ];
// returns NaN
y = [ 0.0, 0.0 ];
n = rempio2( Infinity, y );
// returns 0
y1 = y[ 0 ];
// returns NaN
y2 = y[ 1 ];
// returns NaN
n and stores the remainder r as two numbers in y, such that y[0]+y[1] = r.2^20*π/2 in magnitude, the function only returns the last three binary digits of n and not the full result.var linspace = require( '@stdlib/array-base-linspace' );
var rempio2 = require( '@stdlib/math-base-special-rempio2' );
var x = linspace( 0.0, 100.0, 100 );
var y = [ 0.0, 0.0 ];
var n;
var i;
for ( i = 0; i < x.length; i++ ) {
n = rempio2( x[ i ], y );
console.log( '%d - %dπ/2 = %d + %d', x[ i ], n, y[ 0 ], y[ 1 ] );
}
#include "stdlib/math/base/special/rempio2.h"
Computes x - nπ/2 = r.
#include <stdint.h>
double rem1;
double rem2;
int32_t n = stdlib_base_rempio2( 4.0, &rem1, &rem2 );
The function accepts the following arguments:
[in] double input value.[out] double* destination for first remainder number.[out] double* destination for second remainder number.int32_t stdlib_base_rempio2( const double x, double *rem1, double *rem2 );
n and stores the remainder r as two numbers in rem1 and rem2, respectively, such that rem1+rem2 = r.#include "stdlib/math/base/special/rempio2.h"
#include <stdio.h>
#include <stdint.h>
#include <inttypes.h>
int main( void ) {
const double x[] = { 0.0, 1.0, 4.0, 128.0 };
double rem1;
double rem2;
int32_t n;
int i;
for ( i = 0; i < 4; i++ ) {
n = stdlib_base_rempio2( x[ i ], &rem1, &rem2 );
printf( "%lf - %"PRId32"π/2 = %lf + %lf\n", x[ i ], n, rem1, rem2 );
}
}
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.
Copyright © 2016-2024. The Stdlib Authors.
0.3.0 (2024-07-28)
<section class="features">0b633eb - add C implementation for math/base/special/rempio2272ae7a - docs: remove comment (by Athan Reines)2777e4b - bench: resolve lint errors in benchmarks (by Athan Reines)d04dcbd - docs: remove private annotations in C comments (by Philipp Burckhardt)11c882d - chore: update package meta data (#2379) (by stdlib-bot, Athan Reines)ae92cf0 - fix: use significand mask in math/base/special/rempio2 (#2366) (by Gunj Joshi)0b633eb - feat: add C implementation for math/base/special/rempio2 (by Gunj Joshi, Philipp Burckhardt, Athan Reines)A total of 3 people contributed to this release. Thank you to the following contributors:
FAQs
Compute `x - nπ/2 = r`.
The npm package @stdlib/math-base-special-rempio2 receives a total of 41,598 weekly downloads. As such, @stdlib/math-base-special-rempio2 popularity was classified as popular.
We found that @stdlib/math-base-special-rempio2 demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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