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 | 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 1x 1x 1x | /**
* @license Apache-2.0
*
* Copyright (c) 2018 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 floor = require( '@stdlib/math/base/special/floor' );
// FUNCTIONS //
/**
* Comparator function used to sort values in ascending order.
*
* @private
* @param {number} a - first number
* @param {number} b - second number
* @returns {number} difference between `a` and `b`
*/
function ascending( a, b ) {
return a - b;
}
/**
* Computes a quantile of the values in a numeric array.
*
* @private
* @param {NumericArray} arr - sorted 1d array
* @param {Probability} p - quantile prob [0,1]
* @returns {number} quantile
*/
function quantile( arr, p ) {
var len = arr.length;
var id;
var h;
h = ( ( len - 1.0 ) * p ) + 1.0;
id = floor( h ) - 1.0;
return arr[ id ] + ( ( h - floor( h ) ) * ( arr[ id + 1 ] - arr[ id ] ) );
}
// MAIN //
/**
* Computes the inter-quartile range for a numeric array.
*
* @private
* @param {NumericArray} data - ndarray like data
* @param {number} j - column index for which to get the IQR
* @returns {number} inter-quartile range
*/
function iqr( data, j ) {
// Copy and sort data --> build X
var arr;
var i;
arr = new Array( data.shape[0] );
for ( i = 0; i < data.shape[0]; i++ ) {
arr[ i ] = data.get( i, j );
}
arr.sort( ascending );
return quantile( arr, 0.75 ) - quantile( arr, 0.25 );
}
// EXPORTS //
module.exports = iqr;
|