Last active
March 25, 2018 13:57
-
-
Save HTLife/bb9267d11f39b837d4d09f19870d783f to your computer and use it in GitHub Desktop.
MNIST CNNs + LSTM
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# pytorch mnist cnn + lstm | |
from __future__ import print_function | |
import argparse | |
import torch | |
import torch.nn as nn | |
import torch.nn.functional as F | |
import torch.optim as optim | |
from torchvision import datasets, transforms | |
from torch.autograd import Variable | |
# Training settings | |
# parser = argparse.ArgumentParser(description='PyTorch MNIST Example') | |
# parser.add_argument('--batch-size', type=int, default=64, metavar='N', | |
# help='input batch size for training (default: 64)') | |
# parser.add_argument('--test-batch-size', type=int, default=1000, metavar='N', | |
# help='input batch size for testing (default: 1000)') | |
# parser.add_argument('--epochs', type=int, default=10, metavar='N', | |
# help='number of epochs to train (default: 10)') | |
# parser.add_argument('--lr', type=float, default=0.01, metavar='LR', | |
# help='learning rate (default: 0.01)') | |
# parser.add_argument('--momentum', type=float, default=0.5, metavar='M', | |
# help='SGD momentum (default: 0.5)') | |
# parser.add_argument('--no-cuda', action='store_true', default=False, | |
# help='disables CUDA training') | |
# parser.add_argument('--seed', type=int, default=1, metavar='S', | |
# help='random seed (default: 1)') | |
# parser.add_argument('--log-interval', type=int, default=10, metavar='N', | |
# help='how many batches to wait before logging training status') | |
# args = parser.parse_args() | |
class Args: | |
def __init__(self): | |
self.cuda = True | |
self.no_cuda = False | |
self.seed = 1 | |
self.batch_size = 50 | |
self.test_batch_size = 1000 | |
self.epochs = 10 | |
self.lr = 0.01 | |
self.momentum = 0.5 | |
self.log_interval = 10 | |
args = Args() | |
args.cuda = not args.no_cuda and torch.cuda.is_available() | |
torch.manual_seed(args.seed) | |
if args.cuda: | |
torch.cuda.manual_seed(args.seed) | |
kwargs = {'num_workers': 1, 'pin_memory': True} if args.cuda else {} | |
train_loader = torch.utils.data.DataLoader( | |
datasets.MNIST( | |
'../data', | |
train=True, | |
download=True, | |
transform=transforms.Compose([ | |
transforms.ToTensor(), | |
transforms.Normalize((0.1307, ), (0.3081, )) | |
])), | |
batch_size=args.batch_size, | |
shuffle=True, | |
**kwargs) | |
test_loader = torch.utils.data.DataLoader( | |
datasets.MNIST( | |
'../data', | |
train=False, | |
transform=transforms.Compose([ | |
transforms.ToTensor(), | |
transforms.Normalize((0.1307, ), (0.3081, )) | |
])), | |
batch_size=args.test_batch_size, | |
shuffle=True, | |
**kwargs) | |
class CNN(nn.Module): | |
def __init__(self): | |
super(CNN, self).__init__() | |
self.conv1 = nn.Conv2d(1, 10, kernel_size=5) | |
self.conv2 = nn.Conv2d(10, 20, kernel_size=5) | |
self.conv2_drop = nn.Dropout2d() | |
self.fc1 = nn.Linear(320, 50) | |
self.fc2 = nn.Linear(50, 10) | |
def forward(self, x): | |
x = F.relu(F.max_pool2d(self.conv1(x), 2)) | |
x = F.relu(F.max_pool2d(self.conv2_drop(self.conv2(x)), 2)) | |
x = x.view(-1, 320) | |
#x = F.relu(self.fc1(x)) | |
#x = F.dropout(x, training=self.training) | |
#x = self.fc2(x) | |
#return F.log_softmax(x, dim=1) | |
return x | |
class Combine(nn.Module): | |
def __init__(self): | |
super(Combine, self).__init__() | |
self.cnn = CNN() | |
self.rnn = nn.LSTM( | |
input_size=320, | |
hidden_size=64, | |
num_layers=1, | |
batch_first=True) | |
self.linear = nn.Linear(64,10) | |
def forward(self, x): | |
batch_size, timesteps, C, H, W = x.size() | |
c_in = x.view(batch_size * timesteps, C, H, W) | |
c_out = self.cnn(c_in) | |
r_in = c_out.view(batch_size, timesteps, -1) | |
r_out, (h_n, h_c) = self.rnn(r_in) | |
r_out2 = self.linear(r_out[:, -1, :]) | |
return F.log_softmax(r_out2, dim=1) | |
model = Combine() | |
if args.cuda: | |
model.cuda() | |
optimizer = optim.SGD(model.parameters(), lr=args.lr, momentum=args.momentum) | |
def train(epoch): | |
model.train() | |
for batch_idx, (data, target) in enumerate(train_loader): | |
data = np.expand_dims(data, axis=1) | |
data = torch.FloatTensor(data) | |
if args.cuda: | |
data, target = data.cuda(), target.cuda() | |
data, target = Variable(data), Variable(target) | |
optimizer.zero_grad() | |
output = model(data) | |
loss = F.nll_loss(output, target) | |
loss.backward() | |
optimizer.step() | |
if batch_idx % args.log_interval == 0: | |
print('Train Epoch: {} [{}/{} ({:.0f}%)]\tLoss: {:.6f}'.format( | |
epoch, batch_idx * len(data), len(train_loader.dataset), | |
100. * batch_idx / len(train_loader), loss.data[0])) | |
def test(): | |
model.eval() | |
test_loss = 0 | |
correct = 0 | |
for data, target in test_loader: | |
data = np.expand_dims(data, axis=1) | |
data = torch.FloatTensor(data) | |
print(target.size) | |
if args.cuda: | |
data, target = data.cuda(), target.cuda() | |
data, target = Variable(data, volatile=True), Variable(target) | |
output = model(data) | |
test_loss += F.nll_loss( | |
output, target, size_average=False).data[0] # sum up batch loss | |
pred = output.data.max( | |
1, keepdim=True)[1] # get the index of the max log-probability | |
correct += pred.eq(target.data.view_as(pred)).long().cpu().sum() | |
test_loss /= len(test_loader.dataset) | |
print( | |
'\nTest set: Average loss: {:.4f}, Accuracy: {}/{} ({:.0f}%)\n'.format( | |
test_loss, correct, len(test_loader.dataset), | |
100. * correct / len(test_loader.dataset))) | |
for epoch in range(1, args.epochs + 1): | |
train(epoch) | |
test() |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment