@stdlib/math-base-special-ceilsd

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!

ceilsd

Round a numeric value to the nearest number toward positive infinity with N significant figures.

Installation

npm install @stdlib/math-base-special-ceilsd

Usage

var ceilsd = require( '@stdlib/math-base-special-ceilsd' );

ceilsd( x, n, b )

Rounds a numeric value to the nearest number toward positive infinity with n significant figures.

var v = ceilsd( 3.141592653589793, 5, 10 );
// returns 3.1416

v = ceilsd( 3.141592653589793, 1, 10 );
// returns 4.0

v = ceilsd( 12368.0, 2, 10 );
// returns 13000.0

v = ceilsd( 0.0313, 2, 2 );
// returns 0.046875

Examples

var randu = require( '@stdlib/random-base-randu' );
var ceilsd = require( '@stdlib/math-base-special-ceilsd' );

var x;
var y;
var i;

for ( i = 0; i < 100; i++ ) {
    x = (randu()*10000.0) - 5000.0;
    y = ceilsd( x, 5, 10 );
    console.log( 'x: %d. Rounded: %d.', x, y );
}

---

C APIs

Usage

#include "stdlib/math/base/special/ceilsd.h"

stdlib_base_ceilsd( x, n, b )

Rounds a numeric value to the nearest number toward negative infinity with n significant figures.

double out = stdlib_base_ceilsd( 0.0313, 2, 2 );
// returns 0.046875

The function accepts the following arguments:

• x: [in] double input value.
• n: [in] int32_t number of significant figures.
• b: [in] int32_t base.

double stdlib_base_ceilsd( const double x, const int32_t n, const int32_t b );

Examples

#include "stdlib/math/base/special/ceilsd.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[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
    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_ceilsd( x[ i ], n[ i ], b[ i ] );
        printf( "ceilsd(%lf, %d, %d) = %lf\n", x[ i ], n[ i ], b[ i ], v );
    }
}

---

See Also

• @stdlib/math-base/special/ceil: round a double-precision floating-point number toward positive infinity.
• @stdlib/math-base/special/floorsd: round a numeric value to the nearest number toward negative infinity with N significant figures.
• @stdlib/math-base/special/roundsd: round a numeric value to the nearest number with N significant figures.
• @stdlib/math-base/special/truncsd: round a numeric value to the nearest number toward zero with N significant figures.

---

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

---

License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.