def test_batchnorm_training():
for shape in [(2, 3), (2, 3, 2, 2)]:
data_tmp = np.random.normal(size=shape)
s = shape[1],
gamma = np.ones(s)
beta = np.ones(s)
gamma[1] = 3
beta[0] = 3
rolling_mean = np.random.uniform(size=s)
rolling_std = np.random.uniform(size=s)
data = mx.symbol.Variable('data')
test = mx.symbol.BatchNorm(data, fix_gamma=False)
check_numeric_gradient(test, [data_tmp, gamma, beta],
[rolling_mean, rolling_std],
numeric_eps=1e-3,
check_eps=5e-2)
# Gamma needs to be fixed at one when fix_gamma is true,
gamma = np.ones(s)
test = mx.symbol.BatchNorm(data, fix_gamma=True)
check_numeric_gradient(test, [data_tmp, gamma, beta],
[rolling_mean, rolling_std],
numeric_eps=1e-3,
check_eps=5e-2)
def test_batchnorm_training():
for shape in [(2, 3), (2, 3, 2, 2)]:
data_tmp = np.random.normal(size=shape)
s = (shape[1],)
gamma = np.ones(s)
beta = np.ones(s)
gamma[1] = 3
beta[0] = 3
rolling_mean = np.random.uniform(size=s)
rolling_std = np.random.uniform(size=s)
data = mx.symbol.Variable("data")
test = mx.symbol.BatchNorm(data, fix_gamma=False)
check_numeric_gradient(
test, [data_tmp, gamma, beta], [rolling_mean, rolling_std], numeric_eps=1e-3, check_eps=5e-2
)
# Gamma needs to be fixed at one when fix_gamma is true,
gamma = np.ones(s)
test = mx.symbol.BatchNorm(data, fix_gamma=True)
check_numeric_gradient(
test, [data_tmp, gamma, beta], [rolling_mean, rolling_std], numeric_eps=1e-3, check_eps=5e-2
)
def test_pow_fn():
shape = (3, 4)
exp = mx.symbol.Variable("exp")
y = mx.sym.pow(2, exp)
x = np.ones(shape)*3
check_numeric_gradient(y, [x])
check_symbolic_forward(y, [x], [2**x])
check_symbolic_backward(y, [x], [np.ones(shape)], [np.log(2) * 2**x])
def test_scalar_pow():
data = mx.symbol.Variable('data')
shape = (1, 1)
data_tmp = np.ones(shape)
test = data ** 2
check_numeric_gradient(test, [data_tmp])
check_symbolic_forward(test, [data_tmp], [data_tmp ** 2])
check_symbolic_backward(test, [data_tmp], [np.ones(shape)], [2 * data_tmp])
def test_pow_fn():
shape = (3, 4)
exp = mx.symbol.Variable("exp")
y = mx.sym.pow(2, exp)
x = np.ones(shape) * 3
check_numeric_gradient(y, [x])
check_symbolic_forward(y, [x], [2**x])
check_symbolic_backward(y, [x], [np.ones(shape)], [np.log(2) * 2**x])
def test_scalar_pow():
data = mx.symbol.Variable('data')
shape = (1, 1)
data_tmp = np.ones(shape)
test = data**2
check_numeric_gradient(test, [data_tmp])
check_symbolic_forward(test, [data_tmp], [data_tmp**2])
check_symbolic_backward(test, [data_tmp], [np.ones(shape)], [2 * data_tmp])
def test_symbol_pow():
shape = (1, 1)
data = mx.symbol.Variable('data')
data_tmp = np.ones(shape)*2
exp = mx.symbol.Variable('exp')
exp_tmp = np.ones(shape)*3
test = data**exp
check_numeric_gradient(test, [data_tmp, exp_tmp])
check_symbolic_forward(test, [data_tmp, exp_tmp], [data_tmp**exp_tmp])
data_dir = data_tmp**(exp_tmp - 1) * exp_tmp
exp_dir = data_tmp**(exp_tmp) * np.log(data_tmp)
check_symbolic_backward(test, [data_tmp, exp_tmp], [np.ones(shape)], [data_dir, exp_dir])
def test_symbol_pow():
shape = (1, 1)
data = mx.symbol.Variable('data')
data_tmp = np.ones(shape)*2
exp = mx.symbol.Variable('exp')
exp_tmp = np.ones(shape)*3
test = data**exp
check_numeric_gradient(test, [data_tmp, exp_tmp])
check_symbolic_forward(test, [data_tmp, exp_tmp], [data_tmp**exp_tmp])
data_dir = data_tmp**(exp_tmp - 1) * exp_tmp
exp_dir = data_tmp**(exp_tmp) * np.log(data_tmp)
check_symbolic_backward(test, [data_tmp, exp_tmp], [np.ones(shape)], [data_dir, exp_dir])
def test_unpooling_backward():
np.random.seed(1)
# Check identity preservation.
for shape in [(1, 3, 5, 5), (3, 1, 5, 5), (1, 7, 4, 4)]:
for pad in [(0, 0)]: #, (0, 1), (1, 0), (1, 1)]:
data_s = mx.symbol.Variable('data')
data = np.array(range(np.prod(shape)),
dtype='float32').reshape(shape)
pl = mx.symbol.Pooling(data=data_s,
pool_type='max',
kernel=(1, 1),
stride=(1, 1),
pad=pad,
name='pool')
upl = mx.symbol.Unpooling(pl,
data_s,
pl,
kernel=(1, 1),
stride=(1, 1),
pad=pad,
name='unpool')
exec_ = upl.simple_bind(ctx=mx.cpu(), data=shape)
exec_.forward(is_train=True)
exec_.backward(mx.nd.ones(shape))
exec_.grad_arrays[0].wait_to_read()
assert np.all(
exec_.grad_arrays[0].asnumpy() == np.ones(shape)), (str(
exec_.grad_arrays[0].asnumpy()))
for shape in [(1, 3, 6, 5), (3, 1, 6, 5), (1, 7, 5, 5)]:
for pad in [(0, 0), (0, 1), (1, 0), (1, 1)]:
data_s = mx.symbol.Variable('data')
pl = mx.symbol.Pooling(data=data_s,
pool_type='max',
kernel=(2, 2),
stride=(2, 2),
pad=pad,
name='pool')
upl = mx.symbol.Unpooling(pl,
data_s,
pl,
kernel=(2, 2),
stride=(2, 2),
pad=pad,
name='unpool')
check_numeric_gradient(upl, [
np.array(range(np.prod(shape)), dtype='float32').reshape(shape)
], [],
numeric_eps=1e-2,
check_eps=7e-2)
# Test special case of smaller step size than filter size.
shape = (1, 1, 5, 5)
data_s = mx.symbol.Variable('data')
data = np.array(range(np.prod(shape)), dtype='float32').reshape(shape)
data[0, 0, 0, 3] = 7
data[0, 0, 1, 3] = 7
data[0, 0, 0, 4] = 7
data[0, 0, 1, 4] = 7
data[0, 0, 1, 2] = 7
pldata_s = mx.symbol.Variable('pldata')
pldata = np.array([[6., 7., 7.], [16., 18., 19.], [21., 23., 24.]],
dtype='float32').reshape((1, 1, 3, 3))
upl = mx.symbol.Unpooling(pldata_s,
data_s,
pldata_s,
kernel=(3, 3),
stride=(2, 2),
pad=(1, 1),
name='unpool')
exec_ = upl.bind(ctx=mx.cpu(),
args={
'data': mx.nd.array(data),
'pldata': mx.nd.array(pldata)
},
args_grad={
'data': mx.nd.zeros((data.shape)),
'pldata': mx.nd.zeros((pldata.shape))
})
exec_.forward(is_train=True)
exec_.backward(
mx.nd.array(range(np.prod(shape)), dtype='float32').reshape(shape))
grad = exec_.grad_arrays[0].asnumpy()
assert np.all(grad[0, 0, 0, 1:3] == 3.)
def test_unpooling_backward():
np.random.seed(1)
# Check identity preservation.
for shape in [(1, 3, 5, 5), (3, 1, 5, 5), (1, 7, 4, 4)]:
for pad in [(0, 0)]: #, (0, 1), (1, 0), (1, 1)]:
data_s = mx.symbol.Variable('data')
data = np.array(range(np.prod(shape)),
dtype='float32').reshape(shape)
pl = mx.symbol.Pooling(data=data_s,
pool_type='max',
kernel=(1, 1),
stride=(1, 1),
pad=pad, name='pool')
upl = mx.symbol.Unpooling(pl, data_s, pl,
kernel=(1, 1),
stride=(1, 1),
pad=pad, name='unpool')
exec_ = upl.simple_bind(ctx=mx.cpu(),
data=shape)
exec_.forward(is_train=True)
exec_.backward(mx.nd.ones(shape))
exec_.grad_arrays[0].wait_to_read()
assert np.all(exec_.grad_arrays[0].asnumpy() == np.ones(shape)), (
str(exec_.grad_arrays[0].asnumpy()))
for shape in [(1, 3, 6, 5), (3, 1, 6, 5), (1, 7, 5, 5)]:
for pad in [(0, 0), (0, 1), (1, 0), (1, 1)]:
data_s = mx.symbol.Variable('data')
pl = mx.symbol.Pooling(data=data_s,
pool_type='max',
kernel=(2, 2),
stride=(2, 2),
pad=pad, name='pool')
upl = mx.symbol.Unpooling(pl, data_s, pl,
kernel=(2, 2),
stride=(2, 2),
pad=pad, name='unpool')
check_numeric_gradient(upl,
[np.array(range(np.prod(shape)),
dtype='float32').reshape(shape)],
[],
numeric_eps=1e-2,
check_eps=7e-2)
# Test special case of smaller step size than filter size.
shape = (1, 1, 5, 5)
data_s = mx.symbol.Variable('data')
data = np.array(range(np.prod(shape)),
dtype='float32').reshape(shape)
data[0, 0, 0, 3] = 7
data[0, 0, 1, 3] = 7
data[0, 0, 0, 4] = 7
data[0, 0, 1, 4] = 7
data[0, 0, 1, 2] = 7
pldata_s = mx.symbol.Variable('pldata')
pldata = np.array([[6., 7., 7.],
[16., 18., 19.],
[21., 23., 24.]], dtype='float32').reshape((1, 1, 3, 3))
upl = mx.symbol.Unpooling(pldata_s, data_s, pldata_s,
kernel=(3, 3),
stride=(2, 2),
pad=(1, 1), name='unpool')
exec_ = upl.bind(ctx=mx.cpu(),
args={'data': mx.nd.array(data),
'pldata': mx.nd.array(pldata)},
args_grad={'data': mx.nd.zeros((data.shape)),
'pldata': mx.nd.zeros((pldata.shape))})
exec_.forward(is_train=True)
exec_.backward(mx.nd.array(range(np.prod(shape)),
dtype='float32').reshape(shape))
grad = exec_.grad_arrays[0].asnumpy()
assert np.all(grad[0, 0, 0, 1:3] == 3.)