Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 23x 18x 23x 8x 8x 23x 4x 4x 11x 11x 11x 11x 23x 1x 1x 1x 1x 1x | /**
* @license Apache-2.0
*
* Copyright (c) 2026 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var absf = require( '@stdlib/math/base/special/absf' );
var floorf = require( '@stdlib/math/base/special/floorf' );
var logf = require( '@stdlib/math/base/special/logf' );
var powf = require( '@stdlib/math/base/special/powf' );
var roundf = require( '@stdlib/math/base/special/roundf' );
var isnan = require( '@stdlib/math/base/assert/is-nan' );
var isInfinite = require( '@stdlib/math/base/assert/is-infinite' );
var isInteger = require( '@stdlib/math/base/assert/is-integer' );
// MAIN //
/**
* Round a single-precision floating-point number to `n` significant figures in base `b`.
*
* @param {number} x - input value
* @param {number} n - number of significant figures
* @param {number} b - base (integer >= 2)
* @returns {number} rounded value
*
* @example
* var v = roundsdf( 3.14159, 3, 10 );
* // returns 3.14
*
* @example
* var v = roundsdf( 3.14159, 1, 10 );
* // returns 3.0
*
* @example
* var v = roundsdf( 12368.0, 2, 10 );
* // returns 11999.999430030612
*
* @example
* var v = roundsdf( 0.0313, 2, 2 );
* // returns 0.03125
*/
function roundsdf( x, n, b ) {
var ax;
var e;
var s;
if (
isnan( x ) ||
isnan( n ) ||
isnan( b ) ||
!isInteger( n ) ||
!isInteger( b ) ||
n < 1 ||
b < 2
) {
return NaN;
}
if ( isInfinite( x ) || x === 0.0 ) {
return x;
}
ax = absf( x );
e = floorf( logf( ax, b ) );
s = powf( b, ( n-1 ) - e );
return roundf( x*s ) / s;
}
// EXPORTS //
module.exports = roundsdf;
|