def make_deep_lstm(size_input, size_mem, n_layers, size_output, size_batch):
inputs = [cgt.matrix(fixed_shape=(size_batch, size_input))]
for _ in xrange(2 * n_layers):
inputs.append(cgt.matrix(fixed_shape=(size_batch, size_mem)))
outputs = []
for i_layer in xrange(n_layers):
prev_h = inputs[i_layer * 2]
prev_c = inputs[i_layer * 2 + 1]
if i_layer == 0:
x = inputs[0]
size_x = size_input
else:
x = outputs[(i_layer - 1) * 2]
size_x = size_mem
input_sums = nn.Affine(size_x, 4 * size_mem)(x) + nn.Affine(
size_x, 4 * size_mem)(prev_h)
sigmoid_chunk = cgt.sigmoid(input_sums[:, 0:3 * size_mem])
in_gate = sigmoid_chunk[:, 0:size_mem]
forget_gate = sigmoid_chunk[:, size_mem:2 * size_mem]
out_gate = sigmoid_chunk[:, 2 * size_mem:3 * size_mem]
in_transform = cgt.tanh(input_sums[:, 3 * size_mem:4 * size_mem])
next_c = forget_gate * prev_c + in_gate * in_transform
next_h = out_gate * cgt.tanh(next_c)
outputs.append(next_c)
outputs.append(next_h)
category_activations = nn.Affine(size_mem, size_output)(outputs[-1])
logprobs = nn.logsoftmax(category_activations)
outputs.append(logprobs)
return nn.Module(inputs, outputs)
def make_deep_lstm(size_input, size_mem, n_layers, size_output, size_batch):
inputs = [cgt.matrix(fixed_shape=(size_batch, size_input))]
for _ in xrange(2*n_layers):
inputs.append(cgt.matrix(fixed_shape=(size_batch, size_mem)))
outputs = []
for i_layer in xrange(n_layers):
prev_h = inputs[i_layer*2]
prev_c = inputs[i_layer*2+1]
if i_layer==0:
x = inputs[0]
size_x = size_input
else:
x = outputs[(i_layer-1)*2]
size_x = size_mem
input_sums = nn.Affine(size_x, 4*size_mem)(x) + nn.Affine(size_x, 4*size_mem)(prev_h)
sigmoid_chunk = cgt.sigmoid(input_sums[:,0:3*size_mem])
in_gate = sigmoid_chunk[:,0:size_mem]
forget_gate = sigmoid_chunk[:,size_mem:2*size_mem]
out_gate = sigmoid_chunk[:,2*size_mem:3*size_mem]
in_transform = cgt.tanh(input_sums[:,3*size_mem:4*size_mem])
next_c = forget_gate*prev_c + in_gate * in_transform
next_h = out_gate*cgt.tanh(next_c)
outputs.append(next_c)
outputs.append(next_h)
category_activations = nn.Affine(size_mem, size_output)(outputs[-1])
logprobs = nn.logsoftmax(category_activations)
outputs.append(logprobs)
return nn.Module(inputs, outputs)
def make_deep_gru(size_input, size_mem, n_layers, size_output, size_batch):
inputs = [cgt.matrix() for i_layer in xrange(n_layers + 1)]
outputs = []
for i_layer in xrange(n_layers):
prev_h = inputs[
i_layer +
1] # note that inputs[0] is the external input, so we add 1
x = inputs[0] if i_layer == 0 else outputs[i_layer - 1]
size_x = size_input if i_layer == 0 else size_mem
update_gate = cgt.sigmoid(
nn.Affine(size_x, size_mem, name="i2u")(x) +
nn.Affine(size_mem, size_mem, name="h2u")(prev_h))
reset_gate = cgt.sigmoid(
nn.Affine(size_x, size_mem, name="i2r")(x) +
nn.Affine(size_mem, size_mem, name="h2r")(prev_h))
gated_hidden = reset_gate * prev_h
p2 = nn.Affine(size_mem, size_mem)(gated_hidden)
p1 = nn.Affine(size_x, size_mem)(x)
hidden_target = cgt.tanh(p1 + p2)
next_h = (1.0 - update_gate) * prev_h + update_gate * hidden_target
outputs.append(next_h)
category_activations = nn.Affine(size_mem, size_output,
name="pred")(outputs[-1])
logprobs = nn.logsoftmax(category_activations)
outputs.append(logprobs)
return nn.Module(inputs, outputs)
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--profile",action="store_true")
parser.add_argument("--unittest",action="store_true")
parser.add_argument("--epochs",type=int,default=10)
args = parser.parse_args()
batchsize = 64
Xshape = (batchsize, 3, 32, 32)
X = cgt.tensor4("X", fixed_shape = Xshape)
y = cgt.vector("y", fixed_shape = (batchsize,), dtype='i4')
conv1 = nn.SpatialConvolution(3, 32, kernelshape=(5,5), pad=(2,2),
weight_init=nn.IIDGaussian(std=1e-4))(X)
relu1 = nn.rectify(conv1)
pool1 = nn.max_pool_2d(relu1, kernelshape=(3,3), stride=(2,2))
conv2 = nn.SpatialConvolution(32, 32, kernelshape=(5,5), pad=(2,2),
weight_init=nn.IIDGaussian(std=0.01))(pool1)
relu2 = nn.rectify(conv2)
pool2 = nn.max_pool_2d(relu2, kernelshape=(3,3), stride=(2,2))
conv3 = nn.SpatialConvolution(32, 64, kernelshape=(5,5), pad=(2,2),
weight_init=nn.IIDGaussian(std=0.01))(pool2)
pool3 = nn.max_pool_2d(conv3, kernelshape=(3,3), stride=(2,2))
relu3 = nn.rectify(pool3)
d0,d1,d2,d3 = relu3.shape
flatlayer = relu3.reshape([d0,d1*d2*d3])
nfeats = cgt.infer_shape(flatlayer)[1]
ip1 = nn.Affine(nfeats, 10)(flatlayer)
logprobs = nn.logsoftmax(ip1)
loss = -logprobs[cgt.arange(batchsize), y].mean()
params = nn.get_parameters(loss)
updates = rmsprop_updates(loss, params, stepsize=1e-3)
train = cgt.function(inputs=[X, y], outputs=[loss], updates=updates)
if args.profile: cgt.profiler.start()
data = fetch_dataset("http://rll.berkeley.edu/cgt-data/cifar10.npz")
Xtrain = data["X_train"]
ytrain = data["y_train"]
print fmt_row(10, ["Epoch","Train NLL","Train Err","Test NLL","Test Err","Epoch Time"])
for i_epoch in xrange(args.epochs):
for start in xrange(0, Xtrain.shape[0], batchsize):
tstart = time.time()
end = start+batchsize
print train(Xtrain[start:end], ytrain[start:end]), time.time()-tstart
if start > batchsize*5: break
# elapsed = time.time() - tstart
# trainerr, trainloss = computeloss(Xtrain[:len(Xtest)], ytrain[:len(Xtest)])
# testerr, testloss = computeloss(Xtest, ytest)
# print fmt_row(10, [i_epoch, trainloss, trainerr, testloss, testerr, elapsed])
if args.profile:
cgt.profiler.print_stats()
return
if args.unittest:
break
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--profile",action="store_true")
parser.add_argument("--unittest",action="store_true")
parser.add_argument("--epochs",type=int,default=10)
args = parser.parse_args()
batchsize = 64
Xshape = (batchsize, 3, 32, 32)
X = cgt.tensor4("X", fixed_shape = Xshape)
y = cgt.vector("y", fixed_shape = (batchsize,), dtype='i4')
conv1 = nn.SpatialConvolution(3, 32, kernelshape=(5,5), pad=(2,2),
weight_init=nn.IIDGaussian(std=1e-4))(X)
relu1 = nn.rectify(conv1)
pool1 = nn.max_pool_2d(relu1, kernelshape=(3,3), stride=(2,2))
conv2 = nn.SpatialConvolution(32, 32, kernelshape=(5,5), pad=(2,2),
weight_init=nn.IIDGaussian(std=0.01))(relu1)
relu2 = nn.rectify(conv2)
pool2 = nn.max_pool_2d(relu2, kernelshape=(3,3), stride=(2,2))
conv3 = nn.SpatialConvolution(32, 64, kernelshape=(5,5), pad=(2,2),
weight_init=nn.IIDGaussian(std=0.01))(pool2)
pool3 = nn.max_pool_2d(conv3, kernelshape=(3,3), stride=(2,2))
relu3 = nn.rectify(pool3)
d0,d1,d2,d3 = relu3.shape
flatlayer = relu3.reshape([d0,d1*d2*d3])
nfeats = cgt.infer_shape(flatlayer)[1]
ip1 = nn.Affine(nfeats, 10)(flatlayer)
logprobs = nn.logsoftmax(ip1)
loss = -logprobs[cgt.arange(batchsize), y].mean()
params = nn.get_parameters(loss)
updates = rmsprop_updates(loss, params, stepsize=1e-3)
train = cgt.function(inputs=[X, y], outputs=[loss], updates=updates)
if args.profile: cgt.profiler.start()
data = np.load("/Users/joschu/Data/cifar-10-batches-py/cifar10.npz")
Xtrain = data["X_train"]
ytrain = data["y_train"]
print fmt_row(10, ["Epoch","Train NLL","Train Err","Test NLL","Test Err","Epoch Time"])
for i_epoch in xrange(args.epochs):
for start in xrange(0, Xtrain.shape[0], batchsize):
tstart = time.time()
end = start+batchsize
print train(Xtrain[start:end], ytrain[start:end]), time.time()-tstart
if start > batchsize*5: break
# elapsed = time.time() - tstart
# trainerr, trainloss = computeloss(Xtrain[:len(Xtest)], ytrain[:len(Xtest)])
# testerr, testloss = computeloss(Xtest, ytest)
# print fmt_row(10, [i_epoch, trainloss, trainerr, testloss, testerr, elapsed])
if args.profile:
cgt.profiler.print_stats()
return
if args.unittest:
break
def make_deep_rrnn(size_input, size_mem, n_layers, size_output, size_batch_in, k_in, k_h):
inputs = [cgt.matrix() for i_layer in xrange(n_layers+1)]
outputs = []
print 'input_size: ', size_input
for i_layer in xrange(n_layers):
prev_h = inputs[i_layer+1] # note that inputs[0] is the external input, so we add 1
x = inputs[0] if i_layer==0 else outputs[i_layer-1]
size_x = size_input if i_layer==0 else size_mem
size_batch = prev_h.shape[0]
xform_h_param = nn.TensorParam((2 * k_h, size_mem), name="rotxform")
xform_h_non = xform_h_param.weight
xform_h_non.props["is_rotation"] = True
xform_h_norm = cgt.norm(xform_h_non, axis=1, keepdims=True)
xform_h = cgt.broadcast('/', xform_h_non, xform_h_norm, "xx,x1")
r_vec = nn.Affine(size_x, 2 * k_in * size_mem)(x)
r_non = cgt.reshape(r_vec, (size_batch, 2 * k_in, size_mem))
r_norm = cgt.norm(r_non, axis=2, keepdims=True)
r = cgt.broadcast('/', r_non, r_norm, "xxx,xx1")
prev_h_3 = cgt.reshape(prev_h, (size_batch, size_mem, 1))
inters_in = [prev_h_3]
colon = slice(None, None, None)
for i in xrange(2 * k_in):
inter_in = inters_in[-1]
r_cur = cgt.subtensor(r, [colon, i, colon])
r_cur_3_transpose = cgt.reshape(r_cur, (size_batch, 1, size_mem))
r_cur_3 = cgt.reshape(r_cur, (size_batch, size_mem, 1))
ref_cur = cgt.batched_matmul(r_cur_3, cgt.batched_matmul(r_cur_3_transpose, inter_in))
inter_out = inter_in - 2 * ref_cur
inters_in.append(inter_out)
h_in_rot = cgt.reshape(inters_in[-1], (size_batch, size_mem))
inters_h = [h_in_rot]
for i in xrange(2 * k_h):
inter_in = inters_h[-1]
r_cur = cgt.subtensor(xform_h, [i, colon])
r_cur_2_transpose = cgt.reshape(r_cur, (size_mem, 1))
r_cur_2 = cgt.reshape(r_cur, (1, size_mem))
ref_cur = cgt.dot(cgt.dot(inter_in, r_cur_2_transpose), r_cur_2)
inter_out = inter_in - 2 * ref_cur
inters_h.append(inter_out)
next_h = inters_h[-1]
outputs.append(next_h)
category_activations = nn.Affine(size_mem, size_output,name="pred")(outputs[-1])
logprobs = nn.logsoftmax(category_activations)
outputs.append(logprobs)
#print 'len outputs:', len(outputs)
#print 'len inputs:', len(inputs)
return nn.Module(inputs, outputs)
def build_fc_return_loss(X, y):
"""
Build fully connected network and return loss
"""
np.random.seed(0)
h1 = nn.rectify(nn.Affine(28 * 28, 256, weight_init=nn.IIDGaussian(std=0.1))(X))
h2 = nn.rectify(nn.Affine(256, 256, weight_init=nn.IIDGaussian(std=0.1))(h1))
logprobs = nn.logsoftmax(nn.Affine(256, 10, weight_init=nn.IIDGaussian(std=0.1))(h2))
neglogliks = -logprobs[cgt.arange(X.shape[0]), y]
loss = neglogliks.mean()
return loss
def make_deep_rrnn_rot_relu(size_input, size_mem, n_layers, size_output,
size_batch_in, k_in, k_h):
inputs = [cgt.matrix() for i_layer in xrange(n_layers + 1)]
outputs = []
print 'input_size: ', size_input
for i_layer in xrange(n_layers):
prev_h = inputs[
i_layer +
1] # note that inputs[0] is the external input, so we add 1
x = inputs[0] if i_layer == 0 else outputs[i_layer - 1]
size_x = size_input if i_layer == 0 else size_mem
size_batch = prev_h.shape[0]
xform_h_param = nn.TensorParam((2 * k_h, size_mem), name="rotxform")
xform_h_non = xform_h_param.weight
xform_h_non.props["is_rotation"] = True
xform_h_norm = cgt.norm(xform_h_non, axis=1, keepdims=True)
xform_h = cgt.broadcast('/', xform_h_non, xform_h_norm, "xx,x1")
add_in_lin = nn.Affine(size_x, size_mem)(x)
add_in_relu = nn.rectify(add_in_lin)
prev_h_scaled = nn.scale_mag(prev_h)
h_in_added = prev_h_scaled + add_in_relu
inters_h = [h_in_added]
colon = slice(None, None, None)
for i in xrange(2 * k_h):
inter_in = inters_h[-1]
r_cur = xform_h[i, :]
#r_cur = cgt.subtensor(xform_h, [i, colon])
r_cur_2_transpose = cgt.reshape(r_cur, (size_mem, 1))
r_cur_2 = cgt.reshape(r_cur, (1, size_mem))
ref_cur = cgt.dot(cgt.dot(inter_in, r_cur_2_transpose), r_cur_2)
inter_out = inter_in - 2 * ref_cur
inters_h.append(inter_out)
next_h = inters_h[-1]
outputs.append(next_h)
category_activations = nn.Affine(size_mem, size_output,
name="pred")(outputs[-1])
logprobs = nn.logsoftmax(category_activations)
outputs.append(logprobs)
#print 'len outputs:', len(outputs)
#print 'len inputs:', len(inputs)
return nn.Module(inputs, outputs)
def build_fc_return_loss(X, y):
"""
Build fully connected network and return loss
"""
np.random.seed(0)
h1 = nn.rectify(
nn.Affine(28 * 28, 256, weight_init=nn.IIDGaussian(std=.1))(X))
h2 = nn.rectify(
nn.Affine(256, 256, weight_init=nn.IIDGaussian(std=.1))(h1))
logprobs = nn.logsoftmax(
nn.Affine(256, 10, weight_init=nn.IIDGaussian(std=.1))(h2))
neglogliks = -logprobs[cgt.arange(X.shape[0]), y]
loss = neglogliks.mean()
return loss
def build_convnet_return_loss(X, y):
np.random.seed(0)
conv1 = nn.rectify(
nn.SpatialConvolution(1, 32, kernelshape=(3, 3), pad=(0, 0), weight_init=nn.IIDGaussian(std=0.1))(X)
)
pool1 = nn.max_pool_2d(conv1, kernelshape=(3, 3), stride=(2, 2))
conv2 = nn.rectify(
nn.SpatialConvolution(32, 32, kernelshape=(3, 3), pad=(0, 0), weight_init=nn.IIDGaussian(std=0.1))(pool1)
)
pool2 = nn.max_pool_2d(conv2, kernelshape=(3, 3), stride=(2, 2))
d0, d1, d2, d3 = pool2.shape
flatlayer = pool2.reshape([d0, d1 * d2 * d3])
nfeats = cgt.infer_shape(flatlayer)[1]
logprobs = nn.logsoftmax(nn.Affine(nfeats, 10)(flatlayer))
loss = -logprobs[cgt.arange(X.shape[0]), y].mean()
return loss
def build_convnet_return_loss(X, y):
np.random.seed(0)
conv1 = nn.rectify(
nn.SpatialConvolution(1,
32,
kernelshape=(3, 3),
pad=(0, 0),
weight_init=nn.IIDGaussian(std=.1))(X))
pool1 = nn.max_pool_2d(conv1, kernelshape=(3, 3), stride=(2, 2))
conv2 = nn.rectify(
nn.SpatialConvolution(32,
32,
kernelshape=(3, 3),
pad=(0, 0),
weight_init=nn.IIDGaussian(std=.1))(pool1))
pool2 = nn.max_pool_2d(conv2, kernelshape=(3, 3), stride=(2, 2))
d0, d1, d2, d3 = pool2.shape
flatlayer = pool2.reshape([d0, d1 * d2 * d3])
nfeats = cgt.infer_shape(flatlayer)[1]
logprobs = nn.logsoftmax(nn.Affine(nfeats, 10)(flatlayer))
loss = -logprobs[cgt.arange(X.shape[0]), y].mean()
return loss
def make_deep_gru(size_input, size_mem, n_layers, size_output, size_batch):
inputs = [cgt.matrix() for i_layer in xrange(n_layers+1)]
outputs = []
for i_layer in xrange(n_layers):
prev_h = inputs[i_layer+1] # note that inputs[0] is the external input, so we add 1
x = inputs[0] if i_layer==0 else outputs[i_layer-1]
size_x = size_input if i_layer==0 else size_mem
update_gate = cgt.sigmoid(
nn.Affine(size_x, size_mem,name="i2u")(x)
+ nn.Affine(size_mem, size_mem, name="h2u")(prev_h))
reset_gate = cgt.sigmoid(
nn.Affine(size_x, size_mem,name="i2r")(x)
+ nn.Affine(size_mem, size_mem, name="h2r")(prev_h))
gated_hidden = reset_gate * prev_h
p2 = nn.Affine(size_mem, size_mem)(gated_hidden)
p1 = nn.Affine(size_x, size_mem)(x)
hidden_target = cgt.tanh(p1+p2)
next_h = (1.0-update_gate)*prev_h + update_gate*hidden_target
outputs.append(next_h)
category_activations = nn.Affine(size_mem, size_output,name="pred")(outputs[-1])
logprobs = nn.logsoftmax(category_activations)
outputs.append(logprobs)
return nn.Module(inputs, outputs)
