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 | 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';
// MAIN //
/**
* Creates a frequency table from an input array.
*
* @private
* @param {NonNegativeInteger} N - number of indexed elements
* @param {Collection} x - input array
* @param {integer} strideX - `x` stride length
* @param {Float64Array} y - output array
* @param {integer} strideY - `y` stride length
* @returns {Collection} output array
*
* @example
* var arr = [ 0, 1, 1, 0, 0, 2, 3, 5 ];
* var out = [ 0, 0, 0, 0, 0, 0, 0, 0 ];
*
* var freq = tabulate( arr.length, arr, 1, out, 1 );
* // returns [ 3, 2, 1, 1, 0, 1, 0, 0 ]
*/
function tabulate( N, x, strideX, y, strideY ) {
var i;
for ( i = 0; i < N; i++ ) {
y[ x[ i*strideX ] * strideY ] += 1;
}
return y;
}
// EXPORTS //
module.exports = tabulate;
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