コード例 #1
0
    def check_backward(self, f):
        x = chainer.Variable(f(self.x))

        y = gradient_clip(x, self.a, self.b)
        y.creator.forward((x.data,))
        y.grad = f(self.y_grad)
        y.backward()
        assert_allclose(y.data, x.data)
        assert_allclose(x.grad, f(self.x_grad_ab))

        y = gradient_clip(x, self.a)
        y.creator.forward((x.data,))
        y.grad = f(self.y_grad)
        y.backward()
        assert_allclose(y.data, x.data)
        assert_allclose(x.grad, f(self.x_grad_a))


    @condition.retry(100)
    def test_backward_cpu(self):
        self.check_backward(lambda x: x)

    @attr.gpu
    @condition.retry(100)
    def test_backward_gpu(self):
        self.check_backward(cuda.to_gpu)


run_module(__name__, __file__)
コード例 #2
0
ファイル: test_reshape.py プロジェクト: akv84/chainer
class TestReshape(unittest.TestCase):
    out_shape = (2, 2, 6)

    def setUp(self):
        self.x = numpy.random.uniform(-1, 1, (4, 3, 2)).astype(numpy.float32)
        self.gy = numpy.random.uniform(-1, 1, (2, 2, 6)).astype(numpy.float32)

    def check_forward(self, x_data):
        shape = self.out_shape
        x = chainer.Variable(x_data)
        y = functions.reshape(x, shape)
        self.assertEqual(y.data.dtype, numpy.float32)
        self.assertTrue((self.x.reshape(shape) == cuda.to_cpu(y.data)).all())

    def test_forward_cpu(self):
        self.check_forward(self.x)

    @attr.gpu
    def test_forward_gpu(self):
        self.check_forward(cuda.to_gpu(self.x))

    def check_backward(self, x_data, y_grad):
        gradient_check.check_backward(functions.Reshape(self.gy.shape), x_data, y_grad)


class TestReshapeUnknownDimension(TestReshape):
    out_shape = (2, -1, 6)


testing.run_module(__name__, __file__)
コード例 #3
0
            y_grad,
            grads,
            eps=1e-2,
            **self.check_double_backward_options)

    def test_double_backward_cpu(self):
        self.check_double_backward(self.x, self.W, self.b, self.gy, self.ggx,
                                   self.ggW, self.ggb)

    def test_double_backward_cpu_nobias(self):
        self.check_double_backward(self.x, self.W, None, self.gy, self.ggx,
                                   self.ggW, None)

    @attr.gpu
    def test_double_backward_gpu(self):
        self.check_double_backward(cuda.to_gpu(self.x), cuda.to_gpu(self.W),
                                   cuda.to_gpu(self.b), cuda.to_gpu(self.gy),
                                   cuda.to_gpu(self.ggx),
                                   cuda.to_gpu(self.ggW),
                                   cuda.to_gpu(self.ggb))

    @attr.gpu
    def test_double_backward_gpu_nobias(self):
        self.check_double_backward(cuda.to_gpu(self.x),
                                   cuda.to_gpu(self.W), None,
                                   cuda.to_gpu(self.gy), cuda.to_gpu(self.ggx),
                                   cuda.to_gpu(self.ggW), None)


testing.run_module(__name__, __file__)