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Added support for sigmoid function to the tensor module

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Benoit Steiner
2015-07-17 09:29:00 -07:00
parent 979b73cebf
commit 06a22ca5bd
5 changed files with 84 additions and 0 deletions
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1
unsupported/test/CMakeLists.txt
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@@ -109,6 +109,7 @@ if(EIGEN_TEST_CXX11)
ei_add_test(cxx11_tensor_contraction "-std=c++0x")
ei_add_test(cxx11_tensor_convolution "-std=c++0x")
ei_add_test(cxx11_tensor_expr "-std=c++0x")
ei_add_test(cxx11_tensor_math "-std=c++0x")
ei_add_test(cxx11_tensor_forced_eval "-std=c++0x")
ei_add_test(cxx11_tensor_fixed_size "-std=c++0x")
ei_add_test(cxx11_tensor_const "-std=c++0x")

46
unsupported/test/cxx11_tensor_math.cpp Normal file
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@@ -0,0 +1,46 @@
// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2015 Benoit Steiner <benoit.steiner.goog@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include "main.h"
#include <Eigen/CXX11/Tensor>
using Eigen::Tensor;
using Eigen::RowMajor;
static void test_tanh()
{
Tensor<float, 1> vec1({6});
vec1.setRandom();
Tensor<float, 1> vec2 = vec1.tanh();
for (int i = 0; i < 6; ++i) {
VERIFY_IS_APPROX(vec2(i), tanhf(vec1(i)));
}
}
static void test_sigmoid()
{
Tensor<float, 1> vec1({6});
vec1.setRandom();
Tensor<float, 1> vec2 = vec1.sigmoid();
for (int i = 0; i < 6; ++i) {
VERIFY_IS_APPROX(vec2(i), 1.0f / (1.0f + std::exp(-vec1(i))));
}
}
void test_cxx11_tensor_math()
{
CALL_SUBTEST(test_tanh());
CALL_SUBTEST(test_sigmoid());
}