72 lines
2.3 KiB
JavaScript
72 lines
2.3 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 Float64Array = require( '@stdlib/array/float64' );
|
|
var Uint8Array = require( '@stdlib/array/uint8' );
|
|
var addon = require( './dnanmskmin.native.js' );
|
|
|
|
|
|
// MAIN //
|
|
|
|
/**
|
|
* Computes the minimum value of a double-precision floating-point strided array according to a mask, ignoring `NaN` values.
|
|
*
|
|
* @param {PositiveInteger} N - number of indexed elements
|
|
* @param {Float64Array} x - input array
|
|
* @param {integer} strideX - `x` stride length
|
|
* @param {NonNegativeInteger} offsetX - `x` starting index
|
|
* @param {Uint8Array} mask - mask array
|
|
* @param {integer} strideMask - `mask` stride length
|
|
* @param {NonNegativeInteger} offsetMask - `mask` starting index
|
|
* @returns {number} minimum value
|
|
*
|
|
* @example
|
|
* var Float64Array = require( '@stdlib/array/float64' );
|
|
* var Uint8Array = require( '@stdlib/array/uint8' );
|
|
* var floor = require( '@stdlib/math/base/special/floor' );
|
|
*
|
|
* var x = new Float64Array( [ 2.0, 1.0, 2.0, -2.0, -2.0, 2.0, 3.0, 4.0, -5.0, -6.0 ] );
|
|
* var mask = new Uint8Array( [ 0, 0, 0, 0, 0, 0, 0, 0, 1, 1 ] );
|
|
* var N = floor( x.length / 2 );
|
|
*
|
|
* var v = dnanmskmin( N, x, 2, 1, mask, 2, 1 );
|
|
* // returns -2.0
|
|
*/
|
|
function dnanmskmin( N, x, strideX, offsetX, mask, strideMask, offsetMask ) {
|
|
var viewX;
|
|
var viewM;
|
|
if ( strideX < 0 ) {
|
|
offsetX += (N-1) * strideX;
|
|
}
|
|
if ( strideMask < 0 ) {
|
|
offsetMask += (N-1) * strideMask;
|
|
}
|
|
viewX = new Float64Array( x.buffer, x.byteOffset+(x.BYTES_PER_ELEMENT*offsetX), x.length-offsetX ); // eslint-disable-line max-len
|
|
viewM = new Uint8Array( mask.buffer, mask.byteOffset+(mask.BYTES_PER_ELEMENT*offsetMask), mask.length-offsetMask ); // eslint-disable-line max-len
|
|
return addon( N, viewX, strideX, viewM, strideMask );
|
|
}
|
|
|
|
|
|
// EXPORTS //
|
|
|
|
module.exports = dnanmskmin;
|