time-to-botec/squiggle/node_modules/@stdlib/stats/base/sminabs/lib/ndarray.js
NunoSempere b6addc7f05 feat: add the node modules
Necessary in order to clearly see the squiggle hotwiring.
2022-12-03 12:44:49 +00:00

79 lines
1.8 KiB
JavaScript

/**
* @license Apache-2.0
*
* Copyright (c) 2020 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 isnanf = require( '@stdlib/math/base/assert/is-nanf' );
var abs = require( '@stdlib/math/base/special/abs' );
// MAIN //
/**
* Computes the minimum absolute value of a single-precision floating-point strided array.
*
* @param {PositiveInteger} N - number of indexed elements
* @param {Float32Array} x - input array
* @param {integer} stride - stride length
* @param {NonNegativeInteger} offset - starting index
* @returns {number} minimum absolute value
*
* @example
* var Float32Array = require( '@stdlib/array/float32' );
* var floor = require( '@stdlib/math/base/special/floor' );
*
* var x = new Float32Array( [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0 ] );
* var N = floor( x.length / 2 );
*
* var v = sminabs( N, x, 2, 1 );
* // returns 1.0
*/
function sminabs( N, x, stride, offset ) {
var min;
var ix;
var v;
var i;
if ( N <= 0 ) {
return NaN;
}
if ( N === 1 || stride === 0 ) {
return abs( x[ offset ] );
}
ix = offset;
min = abs( x[ ix ] );
for ( i = 1; i < N; i++ ) {
ix += stride;
v = abs( x[ ix ] );
if ( isnanf( v ) ) {
return v;
}
if ( v < min ) {
min = v;
}
}
return min;
}
// EXPORTS //
module.exports = sminabs;