def test_lrn():
if not get_compile_info()["CGT_ENABLE_CUDA"]:
raise SkipTest("Skipping because CUDA disabled")
nr.seed(0)
Xval = nr.randn(4,8,16,16)
X = cgt.shared(Xval, name="X", fixed_shape_mask="all")
# X = cgt.tensor4(name='X')
y = cross_channel_lrn(X, localsize=4, alpha=.1, beta=.5)
f = cgt.function([],y)
print f().sum()
print f().sum()
print f().sum()
assert np.isfinite(f().sum())
# print f(Xval).sum()
a = nr.rand(*cgt.infer_shape(y))
loss = (y*a).sum()
gradcheck_model(loss, [X],eps=1e-5)
def test_lrn():
if not get_compile_info()["CGT_ENABLE_CUDA"]:
raise SkipTest("Skipping because CUDA disabled")
nr.seed(0)
Xval = nr.randn(4, 8, 16, 16)
X = cgt.shared(Xval, name="X", fixed_shape_mask="all")
# X = cgt.tensor4(name='X')
y = cross_channel_lrn(X, localsize=4, alpha=.1, beta=.5)
f = cgt.function([], y)
print f().sum()
print f().sum()
print f().sum()
assert np.isfinite(f().sum())
# print f(Xval).sum()
a = nr.rand(*cgt.infer_shape(y))
loss = (y * a).sum()
gradcheck_model(loss, [X], eps=1e-5)
def main():
import argparse
parser = argparse.ArgumentParser()
parser.add_argument("--epochs", type=int, default=10)
parser.add_argument("--profile", action="store_true")
parser.add_argument("--dropout", action="store_true")
parser.add_argument("--stepsize", type=float, default=.001)
parser.add_argument("--model", choices=["dense", "conv"], default="dense")
parser.add_argument("--unittest", action="store_true")
parser.add_argument("--grad_check", action="store_true")
args = parser.parse_args()
if args.grad_check: cgt.set_precision("quad")
# from mldata.org http://mldata.org/repository/data/viewslug/mnist-original/
# converted to npz
mnist = fetch_dataset("http://rll.berkeley.edu/cgt-data/mnist.npz")
Xdata = (mnist["X"] / 255.).astype(cgt.floatX)
ydata = mnist["y"]
np.random.seed(0)
if args.model == "conv":
Xdata = Xdata.reshape(-1, 1, 28, 28)
Xtrain = Xdata[0:60000]
ytrain = ydata[0:60000]
Xtest = Xdata[60000:70000]
ytest = ydata[60000:70000]
sortinds = np.random.permutation(60000)
Xtrain = Xtrain[sortinds]
ytrain = ytrain[sortinds]
X = cgt.tensor4("X",
fixed_shape=(None, 1, 28,
28)) if args.model == "conv" else cgt.matrix(
"X", fixed_shape=(None, 28 * 28))
y = cgt.vector("y", dtype='i8')
if args.model == "dense":
p_drop_input, p_drop_hidden = (0.2, 0.5) if args.dropout else (0, 0)
w_h = init_weights(784, 256)
w_h2 = init_weights(256, 256)
w_o = init_weights(256, 10)
pofy_drop = dense_model(X, w_h, w_h2, w_o, p_drop_input, p_drop_hidden)
pofy_nodrop = dense_model(X, w_h, w_h2, w_o, 0., 0.)
params = [w_h, w_h2, w_o]
elif args.model == "conv":
p_drop_conv, p_drop_hidden = (0.2, 0.5) if args.dropout else (0, 0)
w = init_weights(32, 1, 3, 3)
w2 = init_weights(64, 32, 3, 3)
w3 = init_weights(128, 64, 3, 3)
w4 = init_weights(128 * 2 * 2, 625)
w_o = init_weights(625, 10)
pofy_drop = convnet_model(X, w, w2, w3, w4, w_o, p_drop_conv,
p_drop_hidden)
pofy_nodrop = convnet_model(X, w, w2, w3, w4, w_o, 0., 0.)
params = [w, w2, w3, w4, w_o]
else:
raise RuntimeError("Unreachable")
cost_drop = -cgt.mean(categorical.loglik(y, pofy_drop))
updates = rmsprop_updates(cost_drop, params, stepsize=args.stepsize)
y_nodrop = cgt.argmax(pofy_nodrop, axis=1)
cost_nodrop = -cgt.mean(categorical.loglik(y, pofy_nodrop))
err_nodrop = cgt.cast(cgt.not_equal(y_nodrop, y), cgt.floatX).mean()
train = cgt.function(inputs=[X, y], outputs=[], updates=updates)
computeloss = cgt.function(inputs=[X, y],
outputs=[err_nodrop, cost_nodrop])
batch_size = 128
from cgt.tests import gradcheck_model
if args.grad_check:
cost_nodrop = cgt.core.clone(cost_nodrop, {
X: Xtrain[:1],
y: ytrain[:1]
})
print "doing gradient check..."
print "------------------------------------"
gradcheck_model(cost_nodrop, params[0:1])
print "success!"
return
if args.profile: cgt.profiler.start()
print fmt_row(10, [
"Epoch", "Train NLL", "Train Err", "Test NLL", "Test Err", "Epoch Time"
])
for i_epoch in xrange(args.epochs):
tstart = time.time()
for start in xrange(0, Xtrain.shape[0], batch_size):
end = start + batch_size
train(Xtrain[start:end], ytrain[start:end])
if args.unittest: return
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.execution.profiler.print_stats()
def main():
import argparse
parser=argparse.ArgumentParser()
parser.add_argument("--epochs",type=int,default=10)
parser.add_argument("--profile",action="store_true")
parser.add_argument("--dropout",action="store_true")
parser.add_argument("--stepsize",type=float, default=.001)
parser.add_argument("--model",choices=["dense","conv"],default="dense")
parser.add_argument("--unittest",action="store_true")
parser.add_argument("--grad_check",action="store_true")
parser.add_argument("--devtype",choices=["cpu","gpu"],default="cpu")
args = parser.parse_args()
if args.grad_check: cgt.set_precision("quad")
# from mldata.org http://mldata.org/repository/data/viewslug/mnist-original/
# converted to npz
mnist = fetch_dataset("http://rll.berkeley.edu/cgt-data/mnist.npz")
Xdata = (mnist["X"]/255.).astype(cgt.floatX)
ydata = mnist["y"]
np.random.seed(0)
cgt.update_config(default_device=cgt.core.Device(devtype=args.devtype), backend="native")
if args.model=="conv":
Xdata = Xdata.reshape(-1, 1, 28, 28)
Xtrain = Xdata[0:60000]
ytrain = ydata[0:60000]
Xtest = Xdata[60000:70000]
ytest = ydata[60000:70000]
sortinds = np.random.permutation(60000)
Xtrain = Xtrain[sortinds]
ytrain = ytrain[sortinds]
X = cgt.tensor4("X",fixed_shape=(None,1,28,28)) if args.model=="conv" else cgt.matrix("X", fixed_shape=(None,28*28))
y = cgt.vector("y",dtype='i8')
if args.model == "dense":
p_drop_input,p_drop_hidden = (0.2, 0.5) if args.dropout else (0,0)
w_h = init_weights(784, 256)
w_h2 = init_weights(256, 256)
w_o = init_weights(256, 10)
pofy_drop = dense_model(X, w_h, w_h2, w_o, p_drop_input, p_drop_hidden)
pofy_nodrop = dense_model(X, w_h, w_h2, w_o, 0., 0.)
params = [w_h, w_h2, w_o]
elif args.model == "conv":
p_drop_conv,p_drop_hidden = (0.2, 0.5) if args.dropout else (0,0)
w = init_weights(32, 1, 3, 3)
w2 = init_weights(64, 32, 3, 3)
w3 = init_weights(128, 64, 3, 3)
w4 = init_weights(128 * 2 * 2, 625)
w_o = init_weights(625, 10)
pofy_drop = convnet_model(X, w, w2, w3, w4, w_o, p_drop_conv, p_drop_hidden)
pofy_nodrop = convnet_model(X, w, w2, w3, w4, w_o, 0., 0.)
params = [w, w2, w3, w4, w_o]
else:
raise RuntimeError("Unreachable")
cost_drop = -cgt.mean(categorical.loglik(y, pofy_drop))
updates = rmsprop_updates(cost_drop, params, stepsize=args.stepsize)
y_nodrop = cgt.argmax(pofy_nodrop, axis=1)
cost_nodrop = -cgt.mean(categorical.loglik(y, pofy_nodrop))
err_nodrop = cgt.cast(cgt.not_equal(y_nodrop, y), cgt.floatX).mean()
train = cgt.function(inputs=[X, y], outputs=[], updates=updates)
computeloss = cgt.function(inputs=[X, y], outputs=[err_nodrop,cost_nodrop])
batch_size=128
from cgt.tests import gradcheck_model
if args.grad_check:
cost_nodrop = cgt.core.clone(cost_nodrop, {X:Xtrain[:1],y:ytrain[:1]})
print "doing gradient check..."
print "------------------------------------"
gradcheck_model(cost_nodrop, params[0:1])
print "success!"
return
if args.profile: cgt.profiler.start()
print fmt_row(10, ["Epoch","Train NLL","Train Err","Test NLL","Test Err","Epoch Time"])
for i_epoch in xrange(args.epochs):
tstart = time.time()
for start in xrange(0, Xtrain.shape[0], batch_size):
end = start+batch_size
train(Xtrain[start:end], ytrain[start:end])
if args.unittest: return
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.execution.profiler.print_stats()
def run_training(self,
input,
stepsize=0.01,
epochs=10,
output='None',
batch_size=128,
grad_check=True,
profile=False,
step_decrease_rate=0.5,
step_decrease_time=1000):
# run NN training from input matlab data file, and save test data prediction in output file
# load data from Matlab file, including
# im_data: flattened images
# state_data: concatenated one-hot vectors for each state variable
# label_data: one-hot vector for action (state difference)
if grad_check: cgt.set_precision("quad")
matlab_data = sio.loadmat(input)
im_data = matlab_data["im_data"]
im_data = (im_data - 1) / 255 # obstacles = 1, free zone = 0
state_data = matlab_data["state_data"]
value_data = matlab_data["value_data"]
label_data = matlab_data["label_data"]
Xdata = (np.concatenate((np.concatenate(
(im_data, value_data), axis=1), state_data),
axis=1)).astype(cgt.floatX)
ydata = label_data
training_samples = int(6 / 7.0 * Xdata.shape[0])
Xtrain = Xdata[0:training_samples]
ytrain = ydata[0:training_samples]
Xtest = Xdata[training_samples:]
ytest = ydata[training_samples:]
sortinds = np.random.permutation(training_samples)
Xtrain = Xtrain[sortinds]
ytrain = ytrain[sortinds]
self.updates = rmsprop_updates(self.cost_drop,
self.params,
stepsize=stepsize)
self.train = cgt.function(inputs=[self.X, self.y],
outputs=[],
updates=self.updates)
from cgt.tests import gradcheck_model
if grad_check:
cost_nodrop = cgt.core.clone(self.cost_nodrop, {
self.X: Xtrain[:1],
self.y: ytrain[:1]
})
print "doing gradient check..."
print "------------------------------------"
gradcheck_model(cost_nodrop, self.params[0:1])
print "success!"
return
if profile: cgt.profiler.start()
print fmt_row(10, [
"Epoch", "Train NLL", "Train Err", "Test NLL", "Test Err",
"Epoch Time"
])
for i_epoch in xrange(int(epochs)):
tstart = time.time()
for start in xrange(0, Xtrain.shape[0], batch_size):
end = start + batch_size
self.train(Xtrain[start:end], ytrain[start:end])
elapsed = time.time() - tstart
trainerr, trainloss = self.computeloss(Xtrain[:len(Xtest)],
ytrain[:len(Xtest)])
testerr, testloss = self.computeloss(Xtest, ytest)
print fmt_row(
10, [i_epoch, trainloss, trainerr, testloss, testerr, elapsed])
if (i_epoch > 0) & (i_epoch % step_decrease_time == 0):
stepsize = step_decrease_rate * stepsize
self.updates = rmsprop_updates(self.cost_drop,
self.params,
stepsize=stepsize)
self.train = cgt.function(inputs=[self.X, self.y],
outputs=[],
updates=self.updates)
print stepsize
if profile: cgt.execution.profiler.print_stats()
# save Matlab data
if output != 'None':
sio.savemat(file_name=output,
mdict={
'in': Xtest,
'out': self.y_out(Xtest)
})