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 89 90 91 92 93 94 95 96 97 98 99 100 | 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 16x 16x 16x 16x 16x 16x 16x 16x 12x 12x 12x 16x 1x 1x 16x 1x 1x 16x 2x 16x 14x 14x 14x 14x 14x 14x 14x 14x 14x 8x 8x 8x 8x 14x 14x 14x 14x 14x 14x 14x 14x 2x 2x 2x 14x 14x 14x 14x 14x 14x 14x 14x 3x 3x 3x 3x 16x 3x 3x 3x 3x 3x | /**
* @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 format = require( '@stdlib/string/format' );
// MAIN //
/**
* Returns a function to retrieve the current learning rate.
*
* @private
* @param {string} type - string denoting the learning rate to use. Can be `constant`, `pegasos` or `basic`.
* @param {PositiveNumber} eta0 - constant learning rate
* @param {NonNegativeNumber} lambda - regularization parameter
* @throws {Error} first argument must be `basic`, `constant` or `pegasos`
* @returns {Function} getEta function
*/
function closure( type, eta0, lambda ) {
var iter;
var ret;
iter = 1;
switch ( type ) {
case 'basic':
// Default case: 'basic'
ret = getEtaBasic;
break;
case 'constant':
ret = getEtaConstant;
break;
case 'pegasos':
ret = getEtaPegasos;
break;
default:
throw new Error( format( 'invalid option. `%s` option must be one of the following: "%s". Option: `%s`.', 'learningRate', [ 'basic', 'constant', 'pegasos' ].join( '", "' ), type ) );
}
return ret;
/**
* Returns the basic learning rate.
*
* @private
* @returns {number} learning rate
*/
function getEtaBasic() {
var eta = 1000.0 / ( iter + 1000.0 );
iter += 1;
return eta;
}
/**
* Returns the constant learning rate.
*
* @private
* @returns {number} learning rate
*/
function getEtaConstant() {
iter += 1;
return eta0;
}
/**
* Returns the Pegasos learning rate.
*
* @private
* @returns {number} learning rate
*/
function getEtaPegasos() {
var eta = 1.0 / ( lambda * iter );
iter += 1;
return eta;
}
}
// EXPORTS //
module.exports = closure;
|