"use strict";
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/**
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* @license
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* Copyright 2018 Google Inc. All Rights Reserved.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* =============================================================================
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*/
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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var __generator = (this && this.__generator) || function (thisArg, body) {
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var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
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return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
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function verb(n) { return function (v) { return step([n, v]); }; }
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function step(op) {
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if (f) throw new TypeError("Generator is already executing.");
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while (_) try {
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if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
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if (y = 0, t) op = [op[0] & 2, t.value];
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switch (op[0]) {
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case 0: case 1: t = op; break;
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case 4: _.label++; return { value: op[1], done: false };
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case 5: _.label++; y = op[1]; op = [0]; continue;
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case 7: op = _.ops.pop(); _.trys.pop(); continue;
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default:
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if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
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if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
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if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
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if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
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if (t[2]) _.ops.pop();
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_.trys.pop(); continue;
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}
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op = body.call(thisArg, _);
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} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
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if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
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}
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};
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var _this = this;
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Object.defineProperty(exports, "__esModule", { value: true });
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var tf = require("../index");
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var jasmine_util_1 = require("../jasmine_util");
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var test_util_1 = require("../test_util");
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jasmine_util_1.describeWithFlags('SGDOptimizer', jasmine_util_1.ALL_ENVS, function () {
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it('basic', function () { return __awaiter(_this, void 0, void 0, function () {
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var learningRate, optimizer, x, numTensors, cost, expectedValue1, _a, _b, expectedValue2, _c;
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return __generator(this, function (_d) {
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switch (_d.label) {
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case 0:
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learningRate = .1;
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optimizer = tf.train.sgd(learningRate);
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x = tf.scalar(4).variable();
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numTensors = tf.memory().numTensors;
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cost = optimizer.minimize(function () { return x.square(); }, /* returnCost */ true);
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// Cost should be the only additional arrays.
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expect(tf.memory().numTensors).toBe(numTensors + 1);
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expectedValue1 = -2 * 4 * learningRate + 4;
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_a = test_util_1.expectArraysClose;
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return [4 /*yield*/, x.data()];
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case 1:
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_a.apply(void 0, [_d.sent(), [expectedValue1]]);
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_b = test_util_1.expectArraysClose;
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return [4 /*yield*/, cost.data()];
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case 2:
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_b.apply(void 0, [_d.sent(), [Math.pow(4, 2)]]);
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cost.dispose();
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numTensors = tf.memory().numTensors;
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cost = optimizer.minimize(function () { return x.square(); }, /* returnCost */ false);
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// There should be no new additional Tensors.
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expect(tf.memory().numTensors).toBe(numTensors);
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expectedValue2 = -2 * expectedValue1 * learningRate + expectedValue1;
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_c = test_util_1.expectArraysClose;
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return [4 /*yield*/, x.data()];
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case 3:
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_c.apply(void 0, [_d.sent(), [expectedValue2]]);
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expect(cost).toBe(null);
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optimizer.dispose();
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x.dispose();
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// The only tensor remaining is the argument to variable().
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expect(tf.memory().numTensors).toBe(1);
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return [2 /*return*/];
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}
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});
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}); });
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it('Set and get weights: empty', function () { return __awaiter(_this, void 0, void 0, function () {
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var x, learningRate, optimizer1, weights, _a, optimizer2, _b, optimizer3, _c, _d, _e;
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return __generator(this, function (_f) {
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switch (_f.label) {
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case 0:
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x = tf.scalar(4).variable();
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learningRate = .1;
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optimizer1 = tf.train.sgd(learningRate);
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return [4 /*yield*/, optimizer1.getWeights()];
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case 1:
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weights = _f.sent();
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expect(optimizer1.iterations).toEqual(0);
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optimizer1.minimize(function () { return x.square(); });
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return [4 /*yield*/, optimizer1.getWeights()];
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case 2:
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weights = _f.sent();
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expect(optimizer1.iterations).toEqual(1);
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expect(weights.length).toEqual(1);
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expect(weights[0].name).toEqual('iter');
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_a = test_util_1.expectArraysClose;
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return [4 /*yield*/, weights[0].tensor.data()];
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case 3:
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_a.apply(void 0, [_f.sent(), 1]);
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optimizer2 = tf.train.sgd(learningRate);
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return [4 /*yield*/, optimizer2.setWeights(weights)];
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case 4:
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_f.sent();
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optimizer2.minimize(function () { return x.square(); });
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_b = test_util_1.expectArraysClose;
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return [4 /*yield*/, x.data()];
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case 5:
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_b.apply(void 0, [_f.sent(), 2.56]);
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expect(optimizer2.iterations).toEqual(2);
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optimizer3 = tf.train.sgd(learningRate);
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_d = (_c = optimizer3).setWeights;
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return [4 /*yield*/, optimizer2.getWeights()];
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case 6: return [4 /*yield*/, _d.apply(_c, [_f.sent()])];
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case 7:
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_f.sent();
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optimizer3.minimize(function () { return x.square(); });
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_e = test_util_1.expectArraysClose;
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return [4 /*yield*/, x.data()];
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case 8:
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_e.apply(void 0, [_f.sent(), 2.048]);
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expect(optimizer3.iterations).toEqual(3);
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return [2 /*return*/];
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}
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});
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}); });
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it('serialization round-trip', function () {
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var learningRate = .1;
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var originalOpt = tf.train.sgd(learningRate);
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var reserialized = tf.SGDOptimizer.fromConfig(tf.SGDOptimizer, originalOpt.getConfig());
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expect(reserialized.getConfig()).toEqual(originalOpt.getConfig());
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});
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});
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//# sourceMappingURL=sgd_optimizer_test.js.map
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