/** * @license * Copyright 2020 Google LLC. All Rights Reserved. * 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. * ============================================================================= */ import * as tf from '../index'; import { ALL_ENVS, describeWithFlags } from '../jasmine_util'; import { expectArraysClose } from '../test_util'; import * as util from '../util'; describeWithFlags('tanh', ALL_ENVS, () => { it('basic', async () => { const values = [1, -3, 2, 7, -4]; const a = tf.tensor1d(values); const result = tf.tanh(a); const expected = []; for (let i = 0; i < a.size; i++) { expected[i] = util.tanh(values[i]); } expectArraysClose(await result.data(), expected); }); it('propagates NaNs', async () => { const a = tf.tensor1d([4, NaN, 0]); const res = tf.tanh(a); expectArraysClose(await res.data(), [util.tanh(4), NaN, util.tanh(0)]); }); it('gradients: Scalar', async () => { const a = tf.scalar(0.5); const dy = tf.scalar(8); const gradients = tf.grad(a => tf.tanh(a))(a, dy); expect(gradients.shape).toEqual(a.shape); expect(gradients.dtype).toEqual('float32'); expectArraysClose(await gradients.data(), [8 * (1 - (Math.tanh(0.5) * Math.tanh(0.5)))]); }); it('gradient with clones', async () => { const a = tf.scalar(0.5); const dy = tf.scalar(8); const gradients = tf.grad(a => tf.tanh(a.clone()).clone())(a, dy); expect(gradients.shape).toEqual(a.shape); expect(gradients.dtype).toEqual('float32'); expectArraysClose(await gradients.data(), [8 * (1 - (Math.tanh(0.5) * Math.tanh(0.5)))]); }); it('gradients: Tensor1D', async () => { const aValues = [-1, 2, 3, -5]; const dyValues = [1, 2, 3, 4]; const a = tf.tensor1d(aValues); const dy = tf.tensor1d(dyValues); const gradients = tf.grad(a => tf.tanh(a))(a, dy); const expected = []; for (let i = 0; i < a.size; i++) { expected[i] = dyValues[i] * (1 - (Math.tanh(aValues[i]) * Math.tanh(aValues[i]))); } expect(gradients.shape).toEqual(a.shape); expect(gradients.dtype).toEqual('float32'); expectArraysClose(await gradients.data(), expected); }); it('gradients: Tensor2D', async () => { const aValues = [-3, 1, 2, 3]; const dyValues = [1, 2, 3, 4]; const a = tf.tensor2d(aValues, [2, 2]); const dy = tf.tensor2d(dyValues, [2, 2]); const gradients = tf.grad(a => tf.tanh(a))(a, dy); const expected = []; for (let i = 0; i < a.size; i++) { expected[i] = dyValues[i] * (1 - (Math.tanh(aValues[i]) * Math.tanh(aValues[i]))); } expect(gradients.shape).toEqual(a.shape); expect(gradients.dtype).toEqual('float32'); expectArraysClose(await gradients.data(), expected); }); it('throws when passed a non-tensor', () => { expect(() => tf.tanh({})) .toThrowError(/Argument 'x' passed to 'tanh' must be a Tensor/); }); it('accepts a tensor-like object', async () => { const values = [1, -3, 2, 7, -4]; const result = tf.tanh(values); const expected = []; for (let i = 0; i < values.length; i++) { expected[i] = util.tanh(values[i]); } expectArraysClose(await result.data(), expected); }); it('throws for string tensor', () => { expect(() => tf.tanh('q')) .toThrowError(/Argument 'x' passed to 'tanh' must be float32/); }); it('throws for string tensor', () => { expect(() => tf.tanh(tf.tensor1d([1], 'int32'))) .toThrowError(/Argument 'x' passed to 'tanh' must be float32/); }); }); //# 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* @license\n * Copyright 2020 Google LLC. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n * =============================================================================\n */\n\nimport * as tf from '../index';\nimport {ALL_ENVS, describeWithFlags} from '../jasmine_util';\nimport {expectArraysClose} from '../test_util';\nimport * as util from '../util';\n\ndescribeWithFlags('tanh', ALL_ENVS, () => {\n  it('basic', async () => {\n    const values = [1, -3, 2, 7, -4];\n    const a = tf.tensor1d(values);\n    const result = tf.tanh(a);\n\n    const expected = [];\n    for (let i = 0; i < a.size; i++) {\n      expected[i] = util.tanh(values[i]);\n    }\n    expectArraysClose(await result.data(), expected);\n  });\n\n  it('propagates NaNs', async () => {\n    const a = tf.tensor1d([4, NaN, 0]);\n    const res = tf.tanh(a);\n    expectArraysClose(await res.data(), [util.tanh(4), NaN, util.tanh(0)]);\n  });\n\n  it('gradients: Scalar', async () => {\n    const a = tf.scalar(0.5);\n    const dy = tf.scalar(8);\n\n    const gradients = tf.grad(a => tf.tanh(a))(a, dy);\n\n    expect(gradients.shape).toEqual(a.shape);\n    expect(gradients.dtype).toEqual('float32');\n    expectArraysClose(\n        await gradients.data(), [8 * (1 - (Math.tanh(0.5) * Math.tanh(0.5)))]);\n  });\n\n  it('gradient with clones', async () => {\n    const a = tf.scalar(0.5);\n    const dy = tf.scalar(8);\n\n    const gradients = tf.grad(a => tf.tanh(a.clone()).clone())(a, dy);\n\n    expect(gradients.shape).toEqual(a.shape);\n    expect(gradients.dtype).toEqual('float32');\n    expectArraysClose(\n        await gradients.data(), [8 * (1 - (Math.tanh(0.5) * Math.tanh(0.5)))]);\n  });\n\n  it('gradients: Tensor1D', async () => {\n    const aValues = [-1, 2, 3, -5];\n    const dyValues = [1, 2, 3, 4];\n    const a = tf.tensor1d(aValues);\n    const dy = tf.tensor1d(dyValues);\n\n    const gradients = tf.grad(a => tf.tanh(a))(a, dy);\n\n    const expected = [];\n    for (let i = 0; i < a.size; i++) {\n      expected[i] =\n          dyValues[i] * (1 - (Math.tanh(aValues[i]) * Math.tanh(aValues[i])));\n    }\n\n    expect(gradients.shape).toEqual(a.shape);\n    expect(gradients.dtype).toEqual('float32');\n    expectArraysClose(await gradients.data(), expected);\n  });\n\n  it('gradients: Tensor2D', async () => {\n    const aValues = [-3, 1, 2, 3];\n    const dyValues = [1, 2, 3, 4];\n    const a = tf.tensor2d(aValues, [2, 2]);\n    const dy = tf.tensor2d(dyValues, [2, 2]);\n\n    const gradients = tf.grad(a => tf.tanh(a))(a, dy);\n\n    const expected = [];\n    for (let i = 0; i < a.size; i++) {\n      expected[i] =\n          dyValues[i] * (1 - (Math.tanh(aValues[i]) * Math.tanh(aValues[i])));\n    }\n\n    expect(gradients.shape).toEqual(a.shape);\n    expect(gradients.dtype).toEqual('float32');\n    expectArraysClose(await gradients.data(), expected);\n  });\n\n  it('throws when passed a non-tensor', () => {\n    expect(() => tf.tanh({} as tf.Tensor))\n        .toThrowError(/Argument 'x' passed to 'tanh' must be a Tensor/);\n  });\n\n  it('accepts a tensor-like object', async () => {\n    const values = [1, -3, 2, 7, -4];\n    const result = tf.tanh(values);\n\n    const expected = [];\n    for (let i = 0; i < values.length; i++) {\n      expected[i] = util.tanh(values[i]);\n    }\n    expectArraysClose(await result.data(), expected);\n  });\n\n  it('throws for string tensor', () => {\n    expect(() => tf.tanh('q'))\n        .toThrowError(/Argument 'x' passed to 'tanh' must be float32/);\n  });\n\n  it('throws for string tensor', () => {\n    expect(() => tf.tanh(tf.tensor1d([1], 'int32')))\n        .toThrowError(/Argument 'x' passed to 'tanh' must be float32/);\n  });\n});\n"]}