Package Exports
- @stdlib/math-base-special-ceilb
- @stdlib/math-base-special-ceilb/dist
- @stdlib/math-base-special-ceilb/dist/index.js
- @stdlib/math-base-special-ceilb/lib/index.js
This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@stdlib/math-base-special-ceilb) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.
Readme
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ceilb
Round a numeric value to the nearest multiple of b^n toward positive infinity.
Installation
npm install @stdlib/math-base-special-ceilbUsage
var ceilb = require( '@stdlib/math-base-special-ceilb' );ceilb( x, n, b )
Rounds a numeric value to the nearest multiple of b^n toward positive infinity.
// Round a value to 4 decimal places:
var v = ceilb( 3.141592653589793, -4, 10 );
// returns 3.1416
// If n = 0 or b = 1, `ceilb` behaves like `ceil`:
v = ceilb( 3.141592653589793, 0, 2 );
// returns 4.0
// Round a value to the nearest multiple of two toward positive infinity:
v = ceilb( 5.0, 1, 2 );
// returns 6.0Notes
Due to rounding error in floating-point numbers, rounding may not be exact. For example,
var x = 0.2 + 0.1; // returns 0.30000000000000004 // Should round to 0.3... var v = ceilb( x, -16, 10 ); // returns 0.3000000000000001
Examples
var randu = require( '@stdlib/random-base-randu' );
var round = require( '@stdlib/math-base-special-round' );
var pow = require( '@stdlib/math-base-special-pow' );
var ceilb = require( '@stdlib/math-base-special-ceilb' );
var x;
var n;
var b;
var v;
var i;
for ( i = 0; i < 100; i++ ) {
x = (randu()*100.0) - 50.0;
n = round( (randu()*10.0) - 5.0 );
b = round( randu()*10.0 );
v = ceilb( x, n, b );
console.log( 'x: %d. %d^%d: %d. Rounded: %d.', x, b, n, pow( b, n ), v );
}C APIs
Usage
#include "stdlib/math/base/special/ceilb.h"stdlib_base_ceilb( x, n, b )
Rounds a numeric value to the nearest multiple of b^n toward positive infinity.
double out = stdlib_base_ceilb( 3.141592653589793, -4, 10 );
// returns 3.1416The function accepts the following arguments:
- x:
[in] doubleinput value. - n:
[in] int32_tpower. - b:
[in] int32_tbase.
double stdlib_base_ceilb( const double x, const int32_t n, const int32_t b );Examples
#include "stdlib/math/base/special/ceilb.h"
#include <stdio.h>
#include <stdint.h>
int main( void ) {
const double x[] = { -5.0, -3.89, -2.78, -1.67, -0.56, 0.56, 1.67, 2.78, 3.89, 5.0 };
const int32_t n[] = { -4, -3, -2, -1, 0, 1, 2, 3, 4, 5 };
const int32_t b[] = { 20, 19, 18, 17, 16, 15, 14, 13, 12, 11 };
double v;
int i;
for ( i = 0; i < 10; i++ ) {
v = stdlib_base_ceilb( x[ i ], n[ i ], b[ i ] );
printf( "ceilb(%lf, %d, %d) = %lf\n", x[ i ], n[ i ], b[ i ], v );
}
}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.
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License
See LICENSE.
Copyright
Copyright © 2016-2024. The Stdlib Authors.