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December 21, 2015 23:03
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from sklearn.cross_validation import StratifiedShuffleSplit | |
from sklearn.decomposition import PCA | |
from pandas import read_csv, DataFrame | |
import find_mxnet | |
import mxnet as mx | |
import argparse | |
import os, sys | |
import train_model_poc | |
train = read_csv('/Users/timopheym/Desktop/Projects/data_analysis/learn/kaggle/mnist/train.csv') | |
test = read_csv('/Users/timopheym/Desktop/Projects/data_analysis/learn/kaggle/mnist/test.csv') | |
train_y = train['label'].as_matrix() | |
train_X = train.drop('label', 1).as_matrix() | |
# t = train.drop('label', 1).as_matrix() | |
train_X = train_X.reshape((len(train_X), 28, 28)) | |
# train_y = train_X.reshape((len(train_y), 28, 28)) | |
# pca = PCA() | |
# pca.fit(train_X) | |
# train_X_pca = pca.transform(train_X)[:, 0:60] | |
# train_shuf = StratifiedShuffleSplit(train_y, n_iter = 10, test_size = .2, random_state = 123) | |
parser = argparse.ArgumentParser(description='train an image classifer on mnist') | |
parser.add_argument('--network', type=str, default='mlp', | |
choices = ['mlp', 'lenet'], | |
help = 'the cnn to use') | |
parser.add_argument('--data-dir', type=str, default='mnist/', | |
help='the input data directory') | |
parser.add_argument('--gpus', type=str, | |
help='the gpus will be used, e.g "0,1,2,3"') | |
parser.add_argument('--num-examples', type=int, default=60000, | |
help='the number of training examples') | |
parser.add_argument('--batch-size', type=int, default=128, | |
help='the batch size') | |
parser.add_argument('--lr', type=float, default=.1, | |
help='the initial learning rate') | |
parser.add_argument('--model-prefix', type=str, | |
help='the prefix of the model to load/save') | |
parser.add_argument('--num-epochs', type=int, default=10, | |
help='the number of training epochs') | |
parser.add_argument('--load-epoch', type=int, | |
help="load the model on an epoch using the model-prefix") | |
parser.add_argument('--kv-store', type=str, default='local', | |
help='the kvstore type') | |
parser.add_argument('--lr-factor', type=float, default=1, | |
help='times the lr with a factor for every lr-factor-epoch epoch') | |
parser.add_argument('--lr-factor-epoch', type=float, default=1, | |
help='the number of epoch to factor the lr, could be .5') | |
args = parser.parse_args() | |
def _download(data_dir): | |
if not os.path.isdir(data_dir): | |
os.system("mkdir " + data_dir) | |
os.chdir(data_dir) | |
if (not os.path.exists('train-images-idx3-ubyte')) or \ | |
(not os.path.exists('train-labels-idx1-ubyte')) or \ | |
(not os.path.exists('t10k-images-idx3-ubyte')) or \ | |
(not os.path.exists('t10k-labels-idx1-ubyte')): | |
os.system("wget http://webdocs.cs.ualberta.ca/~bx3/data/mnist.zip") | |
os.system("unzip -u mnist.zip; rm mnist.zip") | |
os.chdir("..") | |
def get_mlp(): | |
""" | |
multi-layer perceptron | |
""" | |
data = mx.symbol.Variable('data') | |
fc1 = mx.symbol.FullyConnected(data = data, name='fc1', num_hidden=128) | |
act1 = mx.symbol.Activation(data = fc1, name='relu1', act_type="relu") | |
fc2 = mx.symbol.FullyConnected(data = act1, name = 'fc2', num_hidden = 64) | |
act2 = mx.symbol.Activation(data = fc2, name='relu2', act_type="relu") | |
fc3 = mx.symbol.FullyConnected(data = act2, name='fc3', num_hidden=10) | |
mlp = mx.symbol.SoftmaxOutput(data = fc3, name = 'softmax') | |
return mlp | |
def get_lenet(): | |
""" | |
LeCun, Yann, Leon Bottou, Yoshua Bengio, and Patrick | |
Haffner. "Gradient-based learning applied to document recognition." | |
Proceedings of the IEEE (1998) | |
""" | |
data = mx.symbol.Variable('data') | |
# first conv | |
conv1 = mx.symbol.Convolution(data=data, kernel=(5,5), num_filter=20) | |
tanh1 = mx.symbol.Activation(data=conv1, act_type="tanh") | |
pool1 = mx.symbol.Pooling(data=tanh1, pool_type="max", | |
kernel=(2,2), stride=(2,2)) | |
# second conv | |
conv2 = mx.symbol.Convolution(data=pool1, kernel=(5,5), num_filter=50) | |
tanh2 = mx.symbol.Activation(data=conv2, act_type="tanh") | |
pool2 = mx.symbol.Pooling(data=tanh2, pool_type="max", | |
kernel=(2,2), stride=(2,2)) | |
# first fullc | |
flatten = mx.symbol.Flatten(data=pool2) | |
fc1 = mx.symbol.FullyConnected(data=flatten, num_hidden=500) | |
tanh3 = mx.symbol.Activation(data=fc1, act_type="tanh") | |
# second fullc | |
fc2 = mx.symbol.FullyConnected(data=tanh3, num_hidden=10) | |
# loss | |
lenet = mx.symbol.SoftmaxOutput(data=fc2, name='softmax') | |
return lenet | |
if args.network == 'mlp': | |
data_shape = (784, ) | |
net = get_mlp() | |
else: | |
data_shape = (1, 28, 28) | |
net = get_lenet() | |
def get_iterator(args, kv): | |
data_dir = args.data_dir | |
if '://' not in args.data_dir: | |
_download(args.data_dir) | |
flat = False if len(data_shape) == 3 else True | |
train = mx.io.MNISTIter( | |
image = data_dir + "train-images-idx3-ubyte", | |
label = data_dir + "train-labels-idx1-ubyte", | |
input_shape = data_shape, | |
batch_size = args.batch_size, | |
shuffle = True, | |
flat = flat, | |
num_parts = kv.num_workers, | |
part_index = kv.rank) | |
val = mx.io.MNISTIter( | |
image = data_dir + "t10k-images-idx3-ubyte", | |
label = data_dir + "t10k-labels-idx1-ubyte", | |
input_shape = data_shape, | |
batch_size = args.batch_size, | |
flat = flat, | |
num_parts = kv.num_workers, | |
part_index = kv.rank) | |
return (train, val) | |
# train | |
train_model_poc.fit(args, net, train_X, train_y) |
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import find_mxnet | |
import mxnet as mx | |
import logging | |
def fit(args, network, train_X, train_Y): | |
# kvstore | |
kv = mx.kvstore.create(args.kv_store) | |
# logging | |
head = '%(asctime)-15s Node[' + str(kv.rank) + '] %(message)s' | |
logging.basicConfig(level=logging.DEBUG, format=head) | |
logging.info('start with arguments %s', args) | |
# load model? | |
model_prefix = args.model_prefix | |
if model_prefix is not None: | |
model_prefix += "-%d" % (kv.rank) | |
model_args = {} | |
if args.load_epoch is not None: | |
assert model_prefix is not None | |
tmp = mx.model.FeedForward.load(model_prefix, args.load_epoch) | |
model_args = {'arg_params' : tmp.arg_params, | |
'aux_params' : tmp.aux_params, | |
'begin_epoch' : args.load_epoch} | |
# save model? | |
checkpoint = None if model_prefix is None else mx.callback.do_checkpoint(model_prefix) | |
# data | |
# (train, val) = data_loader(args, kv) | |
# train | |
devs = mx.cpu() if args.gpus is None else [ | |
mx.gpu(int(i)) for i in args.gpus.split(',')] | |
epoch_size = args.num_examples / args.batch_size | |
if args.kv_store == 'dist_sync': | |
epoch_size /= kv.num_workers | |
model_args['epoch_size'] = epoch_size | |
if 'lr_factor' in args and args.lr_factor < 1: | |
model_args['lr_scheduler'] = mx.lr_scheduler.FactorScheduler( | |
step = max(int(epoch_size * args.lr_factor_epoch), 1), | |
factor = args.lr_factor) | |
if 'clip_gradient' in args and args.clip_gradient is not None: | |
model_args['clip_gradient'] = args.clip_gradient | |
# disable kvstore for single device | |
if 'local' in kv.type and ( | |
args.gpus is None or len(args.gpus.split(',')) is 1): | |
kv = None | |
model = mx.model.FeedForward( | |
ctx = devs, | |
symbol = network, | |
num_epoch = args.num_epochs, | |
learning_rate = args.lr, | |
momentum = 0.9, | |
wd = 0.00001, | |
initializer = mx.init.Xavier(factor_type="in", magnitude=2.34), | |
**model_args) | |
print(train_Y) | |
# model.fit(X= train_X, y = train_Y) | |
model.fit( | |
X = train_X, | |
y = train_Y, | |
# eval_data = val, | |
# kvstore = kv, | |
# batch_end_callback = mx.callback.Speedometer(args.batch_size, 50), | |
# epoch_end_callback = checkpoint | |
) |
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