def __init__( self, use_mnist=False ):
self.use_mnist = use_mnist
if self.use_mnist:
#self.digits = fetch_mldata('MNIST original')
self.mnist_digits_train = fetch_mldata('MNIST original', subset='train')
self.mnist_digits_test = fetch_mldata('MNIST original', subset='test')
else:
self.digits = load_digits()
self.X = self.digits.data
self.y = self.digits.target
self.best_f1_score = 0
self.best_score = 0
"""
def testScript():
print "\n---> Started Logistic Regression - Iris dataset - Own function - k class...\n"
attributes, outcomes = getDataFromFile("../Data/iriskc.data.shuffled")
min_max_scaler = preprocessing.MinMaxScaler(feature_range=(-1,1))
attributes, outcomes = min_max_scaler.fit_transform(np.array(attributes)), np.array(outcomes)
#attributes, outcomes = np.array(attributes), np.array(outcomes)
accrValues, presValues, recallValues, fMeasValues = crossValidate(attributes, outcomes, 10, learningRate=0.01, iterCountMax=750, threshold=0.005, ownFunction=True)
for itr in range(10):
print "Fold %d: \tAccuracy: %f\tPrecision: %f\tRecall: %f\tF-Measure: %f" %(itr+1,accrValues[itr],presValues[itr],recallValues[itr],fMeasValues[itr])
print "\nMean values:\tAccuracy: %f\tPrecision: %f\tRecall: %f\tF-Measure: %f\n" % (np.mean(accrValues),np.mean(presValues),\
np.mean(recallValues),np.mean(fMeasValues))
print "---> Started Logistic Regression - Iris dataset - Inbuilt function - k class...\n"
attributes, outcomes = getDataFromFile("../Data/iriskc.data.shuffled")
min_max_scaler = preprocessing.MinMaxScaler(feature_range=(-1,1))
attributes, outcomes = min_max_scaler.fit_transform(np.array(attributes)), np.array(outcomes)
#attributes, outcomes = np.array(attributes), np.array(outcomes)
accrValues, presValues, recallValues, fMeasValues = crossValidate(attributes, outcomes, 10, learningRate=0.01, iterCountMax=750, threshold=0.005, ownFunction=False)
for itr in range(10):
print "Fold %d: \tAccuracy: %f\tPrecision: %f\tRecall: %f\tF-Measure: %f" %(itr+1,accrValues[itr],presValues[itr],recallValues[itr],fMeasValues[itr])
print "\nMean values:\tAccuracy: %f\tPrecision: %f\tRecall: %f\tF-Measure: %f\n" % (np.mean(accrValues),np.mean(presValues),\
np.mean(recallValues),np.mean(fMeasValues))
print "---> Started Logistic Regression - Digits dataset - Own function - k class...\n"
mnist = datasets.fetch_mldata('MNIST original')
X, y = mnist.data / 255., mnist.target
attributes = X[:20000]
outcomes = y[:20000]
#print list(set(outcomes))
accrValues, presValues, recallValues, fMeasValues = crossValidate(attributes, outcomes, 10, learningRate=0.01, iterCountMax=100, threshold=0.005, ownFunction=False)
for itr in range(10):
print "Fold %d: \tAccuracy: %f\tPrecision: %f\tRecall: %f\tF-Measure: %f" %(itr+1,accrValues[itr],presValues[itr],recallValues[itr],fMeasValues[itr])
print "\nMean values:\tAccuracy: %f\tPrecision: %f\tRecall: %f\tF-Measure: %f\n" % (np.mean(accrValues),np.mean(presValues),\
np.mean(recallValues),np.mean(fMeasValues))
print "---> Started Logistic Regression - Digits dataset - Inbuilt function - k class...\n"
mnist = datasets.fetch_mldata('MNIST original')
X, y = mnist.data / 255., mnist.target
attributes = X[:20000]
outcomes = y[:20000]
#print list(set(outcomes))
accrValues, presValues, recallValues, fMeasValues = crossValidate(attributes, outcomes, 10, learningRate=0.01, iterCountMax=100, threshold=0.005, ownFunction=False)
for itr in range(10):
print "Fold %d: \tAccuracy: %f\tPrecision: %f\tRecall: %f\tF-Measure: %f" %(itr+1,accrValues[itr],presValues[itr],recallValues[itr],fMeasValues[itr])
print "\nMean values:\tAccuracy: %f\tPrecision: %f\tRecall: %f\tF-Measure: %f\n" % (np.mean(accrValues),np.mean(presValues),\
np.mean(recallValues),np.mean(fMeasValues))
def get_data():
"""
Get MNIST data ready to learn with.
Returns
-------
dict
With keys 'train' and 'test'. Both do have the keys 'X' (features)
and'y' (labels)
"""
from sklearn.datasets import fetch_mldata
mnist = fetch_mldata('MNIST original')
x = mnist.data
y = mnist.target
# Scale data to [-1, 1] - This is of major importance!!!
x = x/255.0*2 - 1
from sklearn.cross_validation import train_test_split
x_train, x_test, y_train, y_test = train_test_split(x, y,
test_size=0.33,
random_state=42)
data = {'train': {'X': x_train,
'y': y_train},
'test': {'X': x_test,
'y': y_test}}
return data
def main():
from sklearn import preprocessing
from sklearn.datasets import fetch_mldata
from sklearn.model_selection import cross_val_score
db_name = 'iris'
hid_num = 1000
data_set = fetch_mldata(db_name)
data_set.data = preprocessing.scale(data_set.data)
print(db_name)
print('ECOBELM', hid_num)
e = ECOBELM(hid_num, c=2**5)
ave = 0
for i in range(10):
scores = cross_val_score(
e, data_set.data, data_set.target, cv=5, scoring='accuracy')
ave += scores.mean()
ave /= 10
print("Accuracy: %0.2f " % (ave))
print('ELM', hid_num)
e = ELM(hid_num)
ave = 0
for i in range(10):
scores = cross_val_score(
e, data_set.data, data_set.target, cv=5, scoring='accuracy')
ave += scores.mean()
ave /= 10
print("Accuracy: %0.2f " % (ave))
def get_data(downsample=10,plshow=False):
global data, target, mnist
print("get_data ...")
# Get the MNist Database from Internet or local disk
# This is very powerful for me (the author renyuan)
custom_data_home = '.' # the current directory
mnist = datasets.fetch_mldata('MNIST original', data_home= custom_data_home)
# Downsample mnist as the training set
# I know that there are 70000 pictures in MNist database
# I wish sample a small fraction of the pictures
data = mnist.data[0:60000:downsample]
target = mnist.target[0:60000:downsample]
if plshow:
n_sample = len(data)
data_image = data.reshape(n_sample,28,28)
image_and_target = list(zip(data_image, target))
pl.figure()
for i, (im, tg) in enumerate(image_and_target):
if i>=100: break
pl.subplot(10, 10, i+ 1)
pl.axis('off')
pl.imshow(im, cmap=pl.cm.gray_r)
pl.title('tg=%d'%tg, color='blue')
pl.show()
return data, target
def main():
files = [
join(SCRIPT_DIR, "train_x.npy"),
join(SCRIPT_DIR, "train_y.npy"),
join(SCRIPT_DIR, "validate_x.npy"),
join(SCRIPT_DIR, "validate_y.npy"),
join(SCRIPT_DIR, "test_x.npy"),
join(SCRIPT_DIR, "test_y.npy")
]
if all([exists(fname) and stat(fname).st_size > 100 for fname in files]):
print("Already downloaded. Skipping")
else:
mnist = fetch_mldata('MNIST original')
np.random.seed(1234)
data = mnist.data
target = mnist.target
indices = np.arange(len(data))
np.random.shuffle(indices)
data = data[indices]
target = target[indices]
train_x, train_y = (data[:-10000].astype(np.float32) / 255.0).astype(np.float32), target[:-10000].astype(np.int32)
test_x, test_y = (data[-10000:].astype(np.float32) / 255.0).astype(np.float32), target[-10000:].astype(np.int32)
np.save(join(SCRIPT_DIR, "train_x.npy"), train_x[:int(0.9 * train_x.shape[0])])
np.save(join(SCRIPT_DIR, "train_y.npy"), train_y[:int(0.9 * train_y.shape[0])])
np.save(join(SCRIPT_DIR, "validate_x.npy"), train_x[int(0.9 * train_x.shape[0]):])
np.save(join(SCRIPT_DIR, "validate_y.npy"), train_y[int(0.9 * train_y.shape[0]):])
np.save(join(SCRIPT_DIR, "test_x.npy"), test_x)
np.save(join(SCRIPT_DIR, "test_y.npy"), test_y)
print("Done.")
def load(config, test=False):
"""Load MNIST dataset using scikit-learn. Returns a dict with the
following entries:
- images: n x 28 x 28 array
- data: n x 784 array
- target: n array
"""
dataset = fetch_mldata('mnist-original')
X, y = dataset.data, dataset.target
X = X.astype(np.float32) / 255.0
if test:
idx_start, idx_end = config['test_set']
else:
idx_start, idx_end = config['train_set']
X, y = shuffle(X, y, random_state=42)
X = X[idx_start:idx_end]
y = y[idx_start:idx_end]
return {
'images': X.reshape(-1, 28, 28),
'data': X,
'target': y,
}
def run(data_path):
print "Reading the dataset:", data_path
mnist = fetch_mldata('MNIST original')
mnist.data, mnist.target = shuffle(mnist.data, mnist.target)
# Trunk the data
n_train = 600
n_test = 400
# Define training and testing sets
indices = arange(len(mnist.data))
random.seed(0)
train_idx = random.sample(indices, n_train)
test_idx = random.sample(indices, n_test)
X_train, y_train = mnist.data[train_idx], mnist.target[train_idx]
X_test, y_test = mnist.data[test_idx], mnist.target[test_idx]
# Apply a learning algorithm
print "Applying a learning algorithm..."
clf = RandomForestClassifier(n_estimators=10, n_jobs=1)
clf.fit(X_train, y_train)
# Make a prediction
print "Making predictions..."
y_pred = clf.predict(X_test)
print y_pred
# Evaluate the prediction
print "Evaluating results..."
print "Precision: \t", metrics.precision_score(y_test, y_pred)
print "Recall: \t", metrics.recall_score(y_test, y_pred)
print "F1 score: \t", metrics.f1_score(y_test, y_pred)
print "Mean accuracy: \t", clf.score(X_test, y_test)
def get_mnist(start=None, end=None, random=False, num=None):
mnist = fetch_mldata('MNIST original', data_home='~/diss/mnist')
if random is not None and num is not None:
idx = np.random.choice(range(mnist.data.shape[0]), num)
elif start is not None and end is not None:
idx = range(start, end)
return mnist.data[idx], mnist.target[idx]
def getdataset(datasetname, onehot_encode_strings=True):
# load
dataset = fetch_mldata(datasetname)
# get X and y
X = dshape(dataset.data)
try:
target = dshape(dataset.target)
except:
print("WARNING: No target found. Taking last column of data matrix as target")
target = X[:, -1]
X = X[:, :-1]
if len(target.shape) > 1 and target.shape[1] > X.shape[1]: # some mldata sets are mixed up...
X = target
target = dshape(dataset.data)
if len(X.shape) == 1 or X.shape[1] <= 1:
for k in dataset.keys():
if k != 'data' and k != 'target' and len(dataset[k]) == X.shape[1]:
X = np.hstack((X, dshape(dataset[k])))
# one-hot for categorical values
if onehot_encode_strings:
cat_ft = [i for i in range(X.shape[1]) if 'str' in str(
type(unpack(X[0, i]))) or 'unicode' in str(type(unpack(X[0, i])))]
if len(cat_ft):
for i in cat_ft:
X[:, i] = tonumeric(X[:, i])
X = OneHotEncoder(categorical_features=cat_ft).fit_transform(X)
# if sparse, make dense
try:
X = X.toarray()
except:
pass
# convert y to monotonically increasing ints
y = tonumeric(target).astype(int)
return np.nan_to_num(X.astype(float)), y
def main(description, gpu, output):
logging.basicConfig(level=logging.INFO)
logging.info('fetch MNIST dataset')
mnist = fetch_mldata(description)
mnist.data = mnist.data.astype(numpy.float32)
mnist.data /= 255
mnist.target = mnist.target.astype(numpy.int32)
data_train, data_test, target_train, target_test = train_test_split(mnist.data, mnist.target)
data = data_train, data_test
target = target_train, target_test
start_time = time.time()
if gpu >= 0:
cuda.check_cuda_available()
cuda.get_device(gpu).use()
logging.info("Using gpu device {}".format(gpu))
else:
logging.info("Not using gpu device")
mlp = MLP(data=data, target=target, gpu=gpu)
mlp.train_and_test(n_epoch=1)
end_time = time.time()
logging.info("time = {} min".format((end_time - start_time) / 60.0))
logging.info('saving trained mlp into {}'.format(output))
with open(output, 'wb') as fp:
pickle.dump(mlp, fp)
def get_mnist():
np.random.seed(1234) # set seed for deterministic ordering
mnist = fetch_mldata('MNIST original', data_home='../../data')
p = np.random.permutation(mnist.data.shape[0])
X = mnist.data[p].astype(np.float32)*0.02
Y = mnist.target[p]
return X, Y
def test_classifier_chain_vs_independent_models():
# Verify that an ensemble of classifier chains (each of length
# N) can achieve a higher Jaccard similarity score than N independent
# models
yeast = fetch_mldata('yeast')
X = yeast['data']
Y = yeast['target'].transpose().toarray()
X_train = X[:2000, :]
X_test = X[2000:, :]
Y_train = Y[:2000, :]
Y_test = Y[2000:, :]
ovr = OneVsRestClassifier(LogisticRegression())
ovr.fit(X_train, Y_train)
Y_pred_ovr = ovr.predict(X_test)
chain = ClassifierChain(LogisticRegression(),
order=np.array([0, 2, 4, 6, 8, 10,
12, 1, 3, 5, 7, 9,
11, 13]))
chain.fit(X_train, Y_train)
Y_pred_chain = chain.predict(X_test)
assert_greater(jaccard_similarity_score(Y_test, Y_pred_chain),
jaccard_similarity_score(Y_test, Y_pred_ovr))
def get_datasets():
mnist = fetch_mldata('MNIST original')
data = mnist['data']
target = mnist['target']
data = (data - data.mean(axis=0))
std = data.std(axis=0)
data[:, std > 0] /= std[std > 0]
train_split = 60000
output_size = 10
train_ordered = data[:train_split]
train_labels_ordered = target[:train_split]
training_data = zip(train_ordered, train_labels_ordered)
random.shuffle(training_data)
train = np.array([p[0] for p in training_data])
train_labels = np.array([p[1] for p in training_data])
train_outs = np.array([one_hot(i, output_size)
for i in train_labels])
test = data[train_split:]
test_labels = target[train_split:]
test_outs = np.array([one_hot(i, output_size)
for i in test_labels])
return train, train_outs, test, test_outs
def load_script(script_vars):
def define(var_name, fun, overwrite=False):
if script_vars.has_key(var_name) and not overwrite:
print('%s is already defined' % var_name)
return script_vars[var_name]
else:
print('computing variables %s' % var_name)
value = fun()
script_vars[var_name] = value
globals()[var_name] = value
return value
print(globals().keys())
custom_data_home="/home/stefan2/mnistdata"
custom_data_home="/home/stefan2/mnistdata"
define('mnist', lambda: fetch_mldata('MNIST original', data_home=custom_data_home))
data = mnist.data.astype(float) #[0:100,:] #convert to float
labels = mnist.target #[0:100]
n,m = data.shape
print("num data points %s" % n)
#run the method after successive othogonalization
for j in range(0, 50):
print("iteration: " + str(j))
res = find_dominant_directions(data)
plot_vector_png("pattern_" + str(j), res)
for i in range(0, n):
v = data[i,:]
proj = np.reshape(v, (1, m)).dot(np.reshape(res, (m,1)))[0,0]
data[i,:] = v - proj*res
def load_dataset(randomize = False, overfit = False):
mnist = fetch_mldata('mnist-original', data_home=DATA_DIR)
data = mnist.data
target = mnist.target
data = data.reshape((-1, 28, 28))
target = target.astype(np.uint8)
operator_train = pickle.load(open(DATA_DIR + 'four_operators.pickle', 'rb'))
operator_data = np.array([x[0].reshape((28, 28)) for x in operator_train])
operator_target = np.array([y[1] for y in operator_train])
# # # Overfitting meme
if overfit == True:
temp_data = operator_data
temp_target = operator_target
while operator_data.shape[0] < 20000:
operator_data = np.concatenate((operator_data, temp_data))
operator_target = np.concatenate((operator_target, temp_target))
# # # Overfitting meme
data = np.concatenate((data, operator_data))
target = np.concatenate((target, operator_target))
if randomize:
print 'shuffling data'
data, target = shuffle(data, target, random_state=0)
target = target.astype(np.uint8)
return data, target
def get_mnist_data(data_home=None):
"""
load data on your directry ~/scikit_learn_data/mldata/
if data doesn't exist, it downloads the data from site.
"""
mnist = fetch_mldata('MNIST original')
return mnist
def run():
logging.info("Starting test")
# cone_pipeline = Pipeline([('feature selection', SelectKBest(k=100)),
# ('classification', ConeEstimator())])
# cone_pipeline = Pipeline([('random PCA', RandomizedPCA(n_components=50)),
# ('classification', ConeEstimator(3))])
# classifiers = [DecisionTreeClassifier(),
# MultinomialNB(),
# LinearSVC(),
# ConeEstimator(10)]
classifiers = [ConeEstimator(10)]
#cone_pipeline]
dataset = fetch_mldata('mnist-original')
#dataset = fetch_mldata('sonar')
print "Dataset size: ", len(dataset.data)
print "Features: ", len(dataset.data[0])
binary_map = np.vectorize(lambda x : 1 if x == 1 else 0)
dataset.target = binary_map(dataset.target)
for classifier in classifiers:
method = ShuffleSplit(len(dataset.data), n_iterations = 1, train_size=400, test_size=400)
result = cross_val_score(
classifier, dataset.data,
dataset.target,
cv = method,
score_func = f1_score)
print classifier, result
logging.info("Test complete")
def load_pure_mnist():
mnist = fetch_mldata('mnist-original', data_home=DATA_DIR)
data = mnist.data
target = mnist.target
data = data.reshape((-1, 28, 28))
target = target.astype(np.uint8)
return data, target
def MNIST():
add_fit_and_score(RegularizedNet)
from sklearn.datasets import fetch_mldata
mnist = fetch_mldata('MNIST original')
X = numpy.asarray(mnist.data, dtype='float32')
#X = numpy.asarray(mnist.data, dtype='float64')
if SCALE:
#X = preprocessing.scale(X)
X /= 255.
y = numpy.asarray(mnist.target, dtype='int32')
#y = numpy.asarray(mnist.target, dtype='int64')
print("Total dataset size:")
print("n samples: %d" % X.shape[0])
print("n features: %d" % X.shape[1])
print("n classes: %d" % len(set(y)))
from sklearn import cross_validation, preprocessing
x_train, x_test, y_train, y_test = cross_validation.train_test_split(X, y, test_size=0.2, random_state=42)
dnn=RegularizedNet(numpy_rng=numpy.random.RandomState(123), theano_rng=None,
n_ins=x_train.shape[1],
layers_types=[ReLU, ReLU, LogisticRegression],
layers_sizes=[200, 200],
n_outs=10,
rho=0.95,
eps=1.E-6,
max_norm=0.,
debugprint=False,
L1_reg=0.,
L2_reg=1./x_train.shape[0])#,
dnn.fit(x_train, y_train, max_epochs=60, method='adadelta', verbose=True, plot=False)
test_error = dnn.score(x_test, y_test)
print("score: %f" % (1. - test_error))
def load_banana():
data = da.fetch_mldata("Banana IDA")
x = data.data
y = data.target
x_test = x
y_test = y
return x, x_test, y, y_test
def main():
"""TODO: Docstring for main.
:returns: TODO
"""
alpha = 1.
decay = 0.0006
iter_num = 600
finetune_iter = 220
hyper_params = {
'hidden_layers_sizes':[196,], 'iter_nums':[400,],
'alphas':[1.,], 'decays':[0.003,],
'betas':[3,], 'rhos':[0.1,]
}
enc = OneHotEncoder(sparse=False)
mnist = fetch_mldata('MNIST original', data_home='./')
x_train, x_test, y_train, y_test = \
train_test_split(scale(mnist.data.astype(float)).astype('float32'),
mnist.target.astype('float32'),
test_size=0.5, random_state=0)
x_unlabeled = scale(mnist.data[mnist.target>=5,:].astype(float)).astype('float32')
y_train = enc.fit_transform(y_train.reshape(y_train.shape[0],1)).astype('float32')
t_x = T.matrix()
params, extracted = pretrain_sae(x_unlabeled, hyper_params)
extracted = function(inputs=[t_x], outputs=[sae_extract(t_x, params)])(x_train)[0]
params.append(train_softmax(extracted, y_train, iter_num, alpha, decay))
weights = finetune_sae(x_train, y_train, params, finetune_iter, alpha, decay)
all_label = np.array(range(0, 10))
pred = all_label[softmax2class_max(sae_predict(x_test, weights))]
print accuracy_score(y_test, pred)
print classification_report(y_test, pred)
print confusion_matrix(y_test, pred)
def run(data_path):
print "Reading the dataset:", data_path
## http://continuum.io/blog/wiserf-use-cases-and-benchmarks
mnist = fetch_mldata('MNIST original')
# Define training and testing sets
inds = arange(len(mnist.data))
test_i = random.sample(xrange(len(inds)), int(0.1 * len(inds)))
train_i = numpy.delete(inds, test_i)
X_train = mnist.data[train_i].astype(numpy.double)
y_train = mnist.target[train_i].astype(numpy.double)
X_test = mnist.data[test_i].astype(numpy.double)
y_test = mnist.target[test_i].astype(numpy.double)
# Trunk the data
X_digits, y_digits = shuffle(X_train, y_train)
X_digits_train = X_digits[:1000]
y_digits_train = y_digits[:1000]
X_digits_valid = X_digits[1000:2000]
y_digits_valid = y_digits[1000:2000]
X_digits_test = X_digits[2000:3000]
y_digits_test = y_digits[2000:3000]
knn_digits = KNeighborsClassifier(n_neighbors=10)
knn_digits.fit(X_digits_train, y_digits_train)
print "KNN validation accuracy on MNIST digits: ",
print knn_digits.score(X_digits_valid, y_digits_valid)
def load(train_n, test_n):
mnist = fetch_mldata('MNIST original', data_home='.')
mnist.data = mnist.data.astype(np.float32) / 256.0
mnist.target = mnist.target.astype(np.int32)
N = len(mnist.data)
order = np.random.permutation(N)
train = {i: [] for i in range(10)}
test = {i: [] for i in range(10)}
train_m = math.ceil(train_n / 10)
train_sum = 0
test_m = math.ceil(test_n / 10)
test_sum = 0
for i in range(N):
x = mnist.data[order[i]]
y = mnist.target[order[i]]
if train_sum < train_n and len(train[y]) < train_m:
train[y].append(x)
train_sum += 1
if test_sum < test_n and len(test[y]) < test_m:
test[y].append(x)
test_sum += 1
return train, test
def main():
print '... get mnist data'
mnist = fetch_mldata('MNIST original', data_home='.')
fig, axes = plt.subplots(5, 3, figsize=(6, 8))
data = mnist.data[[0, 7000, 14000, 21000, 28000]]
print '... start training'
for i, (axrow, img) in enumerate(zip(axes, data)):
img = img.reshape(28, 28)
img = (img >= 128).astype(int)
corrupted = get_corrupted_input(img, 0.05)
mrf = MRF(corrupted)
if i == 0:
axes[i][0].set_title('元画像')
axes[i][1].set_title('ノイズあり')
axes[i][2].set_title('ノイズ除去')
axes[i][0].imshow(img, cmap=cm.Greys_r)
axes[i][1].imshow(corrupted, cmap=cm.Greys_r)
axes[i][2].imshow(mrf.denoised, cmap=cm.Greys_r)
for ax in axrow:
ax.xaxis.set_visible(False)
ax.yaxis.set_visible(False)
plt.show()
def make_data(N):
print("fetch MNIST dataset")
mnist = fetch_mldata('MNIST original',data_home='.')
mnist.data = mnist.data.astype(np.float32)
mnist.data /= 255
mnist.taret = mnist.target.astype(np.int32)
# make y label
mnist_target = np.zeros((mnist.target.shape[0],10))
for index, num in enumerate(mnist.target):
mnist_target[index][num] = 1.
# print(mnist_target)
# mazemaze
index = random.sample(range(mnist.target.shape[0]), (mnist.target.shape[0]))
tmp_target = [mnist_target[i] for i in index]
tmp_data = [mnist.data[i] for i in index]
# print("N : ", len(tmp_target))
# print("tmp_target : ", tmp_target)
x_train, x_test = np.split(tmp_data, [N])
y_train, y_test = np.split(tmp_target, [N])
return [x_train, x_test, y_train, y_test]
def download__by_category():
# mnist = fetch_mldata('MNIST original')
mnist = fetch_mldata('MNIST original')
# mnist.data = random.sample(mnist.data, 1000)
# mnist.target = random.sample(mnist.target, 1000)
# mnist.data (70000, 784), mnist.target (70000, 1)
trainX, trainY = mnist.data[:-10000], mnist.target[:-10000]
testX, testY = mnist.data[-10000:], mnist.target[-10000:]
if not exists('train'):
os.makedirs('train')
x = {i:[] for i in range(10)}
for i in range(len(trainY)):
tmp = x[trainY[i]]
tmp.append(trainX[i])
x[trainY[i]] = tmp
for i in range(10):
cPickle.dump(x[i], open(join('train', '{}.pkl'.format(i)), 'w+'))
if not exists('test'):
os.makedirs('test')
x = {i:[] for i in range(10)}
for i in range(len(testY)):
tmp = x[testY[i]]
tmp.append(testX[i])
x[testY[i]] = tmp
for i in range(10):
cPickle.dump(x[i], open(join('test', '{}.pkl'.format(i)), 'w+'))
def prepare_dataset():
print('load MNIST dataset')
mnist = fetch_mldata('MNIST original')
mnist['data'] = mnist['data'].astype(np.float32)
mnist['data'] /= 255
mnist['target'] = mnist['target'].astype(np.int32)
return mnist
def iris_binary():
iris = fetch_mldata('iris')
X = iris.data
y = iris.target
idx = y < 3 # only binary
y[y == 2] = -1
return X[idx, :], y[idx]
def test_configs():
from sklearn import datasets
from datetime import datetime
import sys
import os
import logging
log = logging.getLogger()
handler = logging.StreamHandler(sys.stdout)
fmt = logging.Formatter('%(asctime)s %(levelname)s: %(message)s','%Y-%m-%d %H:%M:%S')
handler.setFormatter(fmt)
log.addHandler(handler)
log.setLevel(logging.DEBUG)
custom_data_home = os.getcwd() + '/sk_data'
digits = datasets.fetch_mldata('MNIST original', data_home=custom_data_home)
X = np.asarray(digits.data, 'float32')
X = X
# images = [imresize(im.reshape(28, 28), (32, 32)) for im in X]
# X = np.vstack([im.flatten() for im in images])
X[X < 128] = 0
X[X >= 128] = 1
X /= 256.
models = []
for w_sigma in [.1, .5, 1, 2, 5]:
for sparsity in [.001, .01, .05, .1, .5]:
log.info('Building RBM_dl:\n w_sigma=%s\n sparsity=%s' %(w_sigma,sparsity,))
model = ConvRBM((28, 28), 40, w_size=11, n_iter=3, verbose=True, w_sigma=w_sigma, sparsity=sparsity)
model.fit(X)
models.append({
'model' : model,
'w_sigma' : w_sigma,
'sparsity' : sparsity,
})
log.info('Done')
return models
import matplotlib.pyplot as plt
from sklearn.datasets import fetch_mldata
from sklearn.svm import SVC
from sklearn.model_selection import train_test_split
from sklearn.metrics import classification_report
# Fetch Data
mnist = fetch_mldata('MNIST original', data_home='data/mnist')
# Show parts of Image
# counter = 1
# for i in range(0,10):
# for j in range(1,11):
# plt.subplot(10,10,counter)
# plt.imshow(mnist.data[i*7000+j].reshape(28,28),cmap=plt.cm.gray)
# plt.axis('off')
# counter += 1
# plt.show()
# Data
X, y = mnist.data, mnist.target
X = X / 255.0 * 2 - 1
X_train, X_test, y_train, y_test = train_test_split(X, y, random_state=11)
print(y_train)
# SVC
clf = SVC(kernel='rbf', C=3, gamma=0.01)
clf.fit(X_train[:10000], y_train[:10000])
# Prediction
predictions = clf.predict(X_test)
random.seed(1)
np.random.seed(1)
NUM_USERS = 50
# Setup directory for train/test data
train_path = './data/train/all_data_0_niid_0_keep_10_train_9.json'
test_path = './data/test/all_data_0_niid_0_keep_10_test_9.json'
dir_path = os.path.dirname(train_path)
if not os.path.exists(dir_path):
os.makedirs(dir_path)
dir_path = os.path.dirname(test_path)
if not os.path.exists(dir_path):
os.makedirs(dir_path)
# Get MNIST data, normalize, and divide by level
mnist = fetch_mldata('MNIST original', data_home='./data')
mu = np.mean(mnist.data.astype(np.float32), 0)
sigma = np.std(mnist.data.astype(np.float32), 0)
mnist.data = (mnist.data.astype(np.float32) - mu) / (sigma + 0.001)
mnist_data = []
for i in trange(10):
idx = mnist.target == i
mnist_data.append(mnist.data[idx])
print("\nNumb samples of each label:\n", [len(v) for v in mnist_data])
###### CREATE USER DATA SPLIT #######
# Assign 100 samples to each user
X = [[] for _ in range(NUM_USERS)]
y = [[] for _ in range(NUM_USERS)]
idx = np.zeros(10, dtype=np.int64)
n_labels = y_.shape[1]
mi = np.zeros((n_labels, n_labels))
for i in xrange(n_labels):
for j in xrange(n_labels):
mi[i, j] = mutual_info_score(y_[:, i], y_[:, j])
mst = minimum_spanning_tree(sparse.csr_matrix(-mi))
edges = np.vstack(mst.nonzero()).T
edges.sort(axis=1)
return edges
dataset = "scene"
#dataset = "yeast"
if dataset == "yeast":
yeast = fetch_mldata("yeast")
X = yeast.data
X = np.hstack([X, np.ones((X.shape[0], 1))])
y = yeast.target.toarray().astype(np.int).T
X_train, X_test = X[:1500], X[1500:]
y_train, y_test = y[:1500], y[1500:]
else:
scene = load_scene()
X_train, X_test = scene['X_train'], scene['X_test']
y_train, y_test = scene['y_train'], scene['y_test']
n_labels = y_train.shape[1]
full = np.vstack([x for x in itertools.combinations(range(n_labels), 2)])
beta2=0.999)
train_step = optimizer.minimize(loss)
return train_step
def accuracy(y, t):
correct_prediction = tf.equal(tf.argmax(y, 1), tf.argmax(t, 1))
accuracy = tf.reduce_mean(tf.cast(correct_prediction, tf.float32))
return accuracy
if __name__ == '__main__':
'''
データの生成
'''
mnist = datasets.fetch_mldata('MNIST original', data_home='.')
n = len(mnist.data)
N = 30000 # MNISTの一部を使う
N_train = 20000
N_validation = 4000
indices = np.random.permutation(range(n))[:N] # ランダムにN枚を選択
X = mnist.data[indices]
X = X / 255.0
X = X - X.mean(axis=1).reshape(len(X), 1)
y = mnist.target[indices]
Y = np.eye(10)[y.astype(int)] # 1-of-K 表現に変換
X_train, X_test, Y_train, Y_test = \
train_test_split(X, Y, train_size=N_train)
from sklearn.preprocessing import StandardScaler
from sklearn.decomposition import PCA
import pydot, io
import time
#######################End imports###################################
####################Do not change anything below
# Load MNIST data. fetch_mldata will download the dataset and put it in a folder called mldata.
# Some things to be aware of:
# The folder mldata will be created in the folder in which you started the notebook
# So to make your life easy, always start IPython notebook from same folder.
# Else the following code will keep downloading MNIST data
try:
mnist = fetch_mldata("MNIST original")
except Exception as ex:
import tensorflow.examples.tutorials.mnist.input_data as input_data
m = input_data.read_data_sets("MNIST")
data = np.concatenate((m.train.images, m.test.images))
target = np.concatenate((m.train.labels, m.test.labels))
class dataFrame:
def __init__(self, data, target):
self.data = data
self.target = target
mnist = dataFrame(data, target)
# mnist = fetch_mldata("MNIST original")
################################
# Set hyperparameters
################################
no_of_hidden_units = 200
learning_rate = 1
batch_size = 100
################################
# Prepare train and test sets
################################
# Fetching the dataset and performing minor normalization
# to help with training
print('Fetching MNIST dataset. Please wait...\n')
dataset = fetch_mldata('MNIST original', data_home='datasets')
dataset.data = dataset.data / 255
# Shuffling the ids to prepare for creation of train and test sets
ids = np.arange(len(dataset.data))
np.random.shuffle(ids)
# The full dataset consists of 70000 labelled examples.
# We will use 60000 examples for training and 10000 for our test set.
n_rows_train = 60000
n_rows_test = len(dataset.target) - n_rows_train
data_train = np.c_[np.ones((n_rows_train, 1)),
dataset.data[ids[:n_rows_train], :]]
targets_train = np.zeros((n_rows_train, 10))
targets_train[np.arange(n_rows_train),
dataset.target[ids[:n_rows_train]].astype(int)] = 1
#9. Load the MNIST dataset (introduced in Chapter 3) and split it into a training set and a test set (take the first 60,000
#instances for training, and the remaining 10,000 for testing). Train a Random Forest classifier on the dataset and time how long it
#takes, then evaluate the resulting model on the test set. Next, use PCA to reduce the dataset’s dimensionality, with an explained
#variance ratio of 95%. Train a new Random Forest classifier on the reduced dataset and see how long it takes. Was training much
#faster? Next evaluate the classifier on the test set: how does it compare to the previous classifier?
import time
start = time.time()
from sklearn.datasets import fetch_mldata
mnist = fetch_mldata('MNIST original') #70,000 numbers between 0-9
X, y = mnist['data'], mnist[
'target'] #Rows are intances, Columns are features (784 features=28x28pixeles). Each pixel (0:white -> 255:black)
from sklearn.model_selection import train_test_split
X_train, X_test, y_train, y_test = train_test_split(X,
y,
train_size=60000,
random_state=42)
from sklearn.ensemble import RandomForestClassifier
rnd_clf = RandomForestClassifier(random_state=42) #Three Model Classifiers
from sklearn.pipeline import Pipeline
from sklearn.decomposition import PCA
reduced_clf = Pipeline([('pca', PCA(n_components=0.95)),
('rnd_reduced_clf',
RandomForestClassifier(random_state=42))])
from sklearn.metrics import accuracy_score
for clf in (rnd_clf, reduced_clf): #Final performance on the test set
start = time.time()
from sklearn import datasets
from neupy import algorithms, layers, environment
environment.reproducible()
theano.config.floatX = 'float32'
def reduce_dimension(network, data):
""" Function minimize input data dimention using
pre-trained autoencoder.
"""
minimized_data = network.input_layer.output(data)
return minimized_data.eval()
mnist = datasets.fetch_mldata('MNIST original')
data = mnist.data / 255.
features_mean = data.mean(axis=0)
data = (data - features_mean).astype(np.float32)
np.random.shuffle(data)
x_train, x_test = data[:60000], data[60000:]
autoencoder = algorithms.Momentum(
[
layers.Dropout(proba=0.5),
layers.Sigmoid(784),
layers.Sigmoid(100),
layers.Output(784),
],
from sklearn.datasets import fetch_mldata
from sklearn.linear_model import LogisticRegression
from sklearn.tree import DecisionTreeClassifier
from sklearn.ensemble import (RandomForestClassifier, ExtraTreesClassifier,
AdaBoostClassifier)
from sklearn.linear_model import SGDClassifier
from sklearn.model_selection import train_test_split
from sklearn.svm import LinearSVC
from sklearn.svm import SVC
from sklearn.utils import shuffle
import matplotlib.pyplot as plt
import numpy as np
mnist = fetch_mldata(
'MNIST original',
data_home='/Users/henryliu/mspc/ml_dev/ml_quantitative/data')
markers = ['o', '*', 's', 'd', 'D', '8', '.']
start0 = time.time()
data, target = shuffle(mnist.data / 255, mnist.target, random_state=0)
n = data.shape[0]
#n = 10000
X, y = data[0:n], target[0:n]
classifiers = [("ada_boost_10",
AdaBoostClassifier(DecisionTreeClassifier(criterion='entropy',
splitter='best'),
n_estimators=10)),
("ada_boost_50",
AdaBoostClassifier(DecisionTreeClassifier(criterion='entropy',
# -*- coding: utf-8 -*-
"""
Created on Wed Feb 21 17:56:23 2018
@author: TIM
"""
import matplotlib.pyplot as plt
from sklearn.datasets import fetch_mldata
from sklearn.neural_network import MLPClassifier
mnist = fetch_mldata("MNIST")
# rescale the data, use the traditional train/test split
X, y = mnist.data / 255., mnist.target
X_train, X_test = X[:60000], X[60000:]
y_train, y_test = y[:60000], y[60000:]
mlp = MLPClassifier(hidden_layer_sizes=(100, 100),
max_iter=400,
alpha=1e-4,
solver='sgd',
verbose=10,
tol=1e-4,
random_state=1)
#mlp = MLPClassifier(hidden_layer_sizes=(50,), max_iter=10, alpha=1e-4,
#solver='sgd', verbose=10, tol=1e-4, random_state=1,
#learning_rate_init=.1)
mlp.fit(X_train, y_train)
print("Training set score: %f" % mlp.score(X_train, y_train))
print("Test set score: %f" % mlp.score(X_test, y_test))
fig, axes = plt.subplots(4, 4)
# use global min / max to ensure all weights are shown on the same scale
def download():
mnist = fetch_mldata('MNIST original')
X = mnist.data.astype('float64')
y = mnist.target
print ('MNIST:', X.shape, y.shape)
return (X, y)
import numpy.random as rand
import matplotlib.pyplot as plt
from sklearn.datasets import fetch_mldata
from sklearn.linear_model import ElasticNetCV
from sklearn.metrics import confusion_matrix, accuracy_score
from sklearn.cross_validation import train_test_split
__doc__ = "See newcomparison.m"
l1_ratio = 0.5
k_fold = 10
test_frac = 0.5
data_root = path.expanduser('~/data')
# Load MNIST data
mnist = fetch_mldata('MNIST original', data_home=data_root)
X = mnist.data
y = mnist.target
# Split into train/test_frac
X_train, X_test, y_train, y_test = train_test_split(X,
y,
test_size=test_frac,
random_state=0)
# Construct and fit model
en = ElasticNetCV(cv=k_fold, n_jobs=-1, random_state=0)
en.fit(X_train, y_train)
# Evaluate performance
y_pred = np.round(en.predict(X_test))
def set_datasets(data="mnist", is_one_hot=True, is_normalize=True, **kwarg):
data_home = "/".join(__file__.split("/")[:-1]) + "/data_dir_for_optimizer"
if data == "mnist":
data_dic = fetch_mldata('MNIST original', data_home=data_home)
if is_one_hot == True:
idx = data_dic["target"]
num = int(idx.max() + 1)
arr = np.zeros((idx.shape[0], num)).flatten()
arr[idx.flatten().astype(int) + np.arange(idx.shape[0]) * num] = 1
data_dic["target"] = arr.reshape(idx.size, num)
if is_normalize == True:
data_dic["data"] = data_dic["data"] / 255
elif data == "boston":
data_dic = load_boston()
if is_normalize == True:
data_dic["data"] = data_dic["data"] / data_dic["data"].max(axis=0)
elif data == "digits":
data_dic = load_digits()
elif data == "iris":
data_dic = load_iris()
if is_one_hot == True:
data_dic["target"] = gen_one_hot(data_dic["target"])
if is_normalize == True:
data_dic["data"] = data_dic["data"] / data_dic["data"].max(axis=0)
elif data == "linnerud":
data_dic = load_linnerud()
elif data == "wine":
arr = np.loadtxt(data_home + "/wine.csv", delimiter=",", skiprows=1)
data_dic = {"data": arr[:, :-1], "target": arr[:, -1]}
if is_one_hot == True:
data_dic["target"] = gen_one_hot(data_dic["target"])
if is_normalize == True:
data_dic["data"] = data_dic["data"] / data_dic["data"].max(axis=0)
elif data == "xor":
data_dic = {
"data": np.array([[0, 0], [0, 1], [1, 0],
[1, 1]]), ##.repeat(20, axis=0),
"target": np.array([0, 1, 1, 0])
} #.repeat(20, axis=0)}
elif data == "serial":
data_dic = {
"data": np.array(np.arange(20).reshape(5, 4)).repeat(20, axis=0),
"target": np.arange(5).repeat(20, axis=0)
}
# elif data == "sin":
# data_dic = {"data": np.arange(0,10,0.01)[:,None],
# "target": np.sin(np.arange(0,10,0.01) * np.pi)}
#
# elif data == "sin":
#
# data_dic = {"data": np.arange(0,10,0.01)[:,None],
# "target": np.sin(np.arange(0,10,0.01) * np.pi)}
elif data == "sin":
v = np.sin(np.pi * np.arange(1000) / 100)
if not "data_length" in kwarg:
data_length = 100
else:
data_length = kwarg["data_length"]
if not "predict_length" in kwarg:
predict_length = 1
else:
data_length = kwarg["data_length"]
x, y, xidx, yidx = gen_time_series(v, data_length, predict_length)
data_dic = {"data": x, "target": y}
elif data == "decay":
v = np.sin(np.pi * np.arange(10000) / np.arange(1, 10001)[::-1] *
10) * np.arange(10000)[::-1]
v = v[:-1000]
x, y, xidx, yidx = gen_time_series(v, 10, 1)
data_dic = {"data": x, "target": y}
if "data_only" in kwarg:
data_dic["target"] = data_dic["data"]
return data_dic["data"], data_dic["target"]
import numpy
from sklearn.utils import shuffle
from sklearn.datasets import fetch_mldata
from sklearn.decomposition import PCA
from sklearn.naive_bayes import GaussianNB
from sklearn.preprocessing import StandardScaler
from machine_learning import MyGaussian
print("Loading ... ")
mnist = fetch_mldata('MNIST original') #, data_home='data' )
X = mnist.data
Y = mnist.target
print("Transforming ... ")
new_X = X
#new_X = numpy.ndarray( [ len(X), 56 ] )
##for n in range(len(X)):
## sample = X[n].reshape(28,28)
## for i in range(28): new_X[n,i] = sample[i,:].sum()
## for j in range(28): new_X[n,28+j] = sample[:,j].sum()
### new_X[n] = new_X[n] / new_X[n].sum()
#X2=X.reshape( len(X), 28, 28 )
#new_X[:,:28] = X2.sum(axis=1)
#new_X[:,28:] = X2.sum(axis=2)
#new_X[:,:] = new_X[:,:] / new_X.sum(axis=1)[:,numpy.newaxis]
from sklearn import datasets
import matplotlib.pyplot as plt
import numpy as np
import argparse
# construct the argument parse and parse the arguments
ap = argparse.ArgumentParser()
ap.add_argument("-o", "--output", required=True,
help="path to the output loss/accuracy plot")
args = vars(ap.parse_args())
# grab the MNIST dataset (if this is your first time running this
# script, the download may take a minute -- the 55MB MNIST dataset
# will be downloaded)
print("[INFO] loading MNIST (full) dataset...")
dataset = datasets.fetch_mldata("MNIST Original")
# scale the raw pixel intensities to the range [0, 1.0], then
# construct the training and testing splits
data = dataset.data.astype("float") / 255.0
(trainX, testX, trainY, testY) = train_test_split(data,
dataset.target, test_size=0.25)
# convert the labels from integers to vectors
lb = LabelBinarizer()
trainY = lb.fit_transform(trainY)
testY = lb.fit_transform(testY)
# define the 784-256-128-10 architecture using Keras
model = Sequential()
model.add(Dense(256, input_shape=(784,), activation='sigmoid'))
import numpy as np
import random
from sklearn.datasets import fetch_mldata
from sklearn.preprocessing import StandardScaler
from sklearn.decomposition import PCA
import matplotlib.pyplot as plt
import scikitplot as skplt
# Get the MNIST data, if not already there
DATA_DIR = "./"
mnist = fetch_mldata('MNIST original', data_home=DATA_DIR)
# Initiate the random generator
rnd = random.Random()
# Separate the mnist data into two arrays
mnist_train_1 = np.array(
[mnist.data[i] for i in range(60000) if mnist.target[i] == 1.0])
mnist_train_5 = np.array(
[mnist.data[i] for i in range(60000) if mnist.target[i] == 5.0])
mnist_test_1 = np.array(
[mnist.data[i] for i in range(60000, 70000) if mnist.target[i] == 1.0])
mnist_test_5 = np.array(
[mnist.data[i] for i in range(60000, 70000) if mnist.target[i] == 5.0])
x = np.concatenate((mnist_train_1, mnist_train_5))
def kmeans(data, k, lam=0.001, lam_dec=0.00005):
# Pick some centroids
centroids = np.array([np.copy(data[rnd.randint(0, data.shape[0] - 1)])])
from sklearn import datasets, svm, metrics
from sklearn.datasets import fetch_mldata
from sklearn.externals import joblib
MODEL_PATH = 'mnist_svm_model_full.pkl'
mnist = fetch_mldata('MNIST original', data_home='./scikit_learn_data')
X_data = mnist.data / 255.0
Y = mnist.target
# print('svm')
classifier = svm.SVC(C=5, gamma=0.05)
classifier.fit(X_data, Y)
joblib.dump(classifier, MODEL_PATH, compress=3)
parameters, losses, test_losses = \
StochasticMLP(X, y, layer_dims, 'multiclass', X_test, y_test, optimizer, lr, batch_size,
beta1, beta2, eps, num_epochs, print_loss, add_del, reg_param,
delta,prob,epsilon,max_hidden_size,tau)
return parameters, losses, test_losses
if __name__ == '__main__':
# data_size = 7
# num_features = 10
# num_classes = 3
#
# X_train = 10.*np.random.rand(num_features,data_size)
# y_train = np.array([[1,0,0],[0,1,0],[0,0,1],[1,0,0],[0,1,0],[0,0,1],[1,0,0]]).T
mnist = fetch_mldata('MNIST original', data_home=os.getcwd())
X = mnist.data.astype(np.float32) / 255.
y_orig = mnist.target
# one-hot encode the labels y_orig: i=0,...,9 --> [0,...,1,...,0]
y = pd.get_dummies(y_orig).values.astype(np.float32)
# pca = PCA(n_components=324)
# pca.fit(X)
# X_pca = pca.transform(X)
X,y = shuffle(X,y)
down_sample = 5000
X_ds = X[:down_sample,:]
y_ds = y[:down_sample,:]
wavelet = 'db5'
level = 1
psi = np.load('./wavelet_mat/{}_{}.npz'.format(wavelet, level))['psi']
def_params = dict(rho = rho,
psi = psi)
# L-inf attack budget, corresponding to images in the range [-1, 1]
epsilon = 0.2
proj_iter = False # Change to True to run attack with iterated projections
# Read MNIST data
digit_1 = 3
digit_2 = 7
fetch_mnist()
mnist = datasets.fetch_mldata("MNIST original")
digit_1_data = 2.0*mnist.data[mnist.target==digit_1]/255.0 - 1.0
digit_2_data = 2.0*mnist.data[mnist.target==digit_2]/255.0 - 1.0
data = np.vstack([digit_1_data, digit_2_data])
labels = np.hstack([np.repeat(digit_1, digit_1_data.shape[0]), np.repeat(digit_2, digit_2_data.shape[0])])
data, labels = utils.shuffle(data, labels, random_state=1234)
x_train, x_test, y_train, y_test = model_selection.train_test_split(data, labels, test_size=0.25, random_state=1234, stratify=labels)
num_test = x_test.shape[0]
print("\n*************************************")
print("{:} vs. {:} classification via linear SVM".format(digit_1,digit_2))
print("*************************************")
print("Attacks use epsilon = {:.2f} \nImages are in the range [-1, 1]\n".format(epsilon))
print("**********")
print("No defense")
print("**********")
if len(sys.argv) == 1:
print(
"ERROR: Please specify implementation to benchmark, 'sknn' or 'nolearn'."
)
sys.exit(-1)
np.set_printoptions(precision=4)
np.set_printoptions(suppress=True)
from sklearn.base import clone
from sklearn.cross_validation import train_test_split
from sklearn.datasets import fetch_mldata
from sklearn.metrics import classification_report
mnist = fetch_mldata('mnist-original')
X_train, X_test, y_train, y_test = train_test_split(
(mnist.data / 255.0).astype(np.float32),
mnist.target.astype(np.int32),
test_size=1.0 / 7.0,
random_state=1234)
classifiers = []
if 'sknn' in sys.argv:
from sknn.platform import gpu32
from sknn.mlp import Classifier, Layer, Convolution
clf = Classifier(
layers=[
# Convolution("Rectifier", channels=10, pool_shape=(2,2), kernel_shape=(3, 3)),
from sklearn.preprocessing import LabelBinarizer
from sklearn.metrics import confusion_matrix, classification_report
import renom as rm
from renom.cuda import cuda
from renom.optimizer import Sgd, Adam
from renom.core import DEBUG_NODE_STAT, DEBUG_GRAPH_INIT, DEBUG_NODE_GRAPH
from renom.operation import sum
DEBUG_GRAPH_INIT(True)
np.random.seed(10)
cuda.set_cuda_active(True)
mnist = fetch_mldata('MNIST original', data_home="dataset")
X = mnist.data
y = mnist.target
X = X.astype(np.float32)
X /= X.max()
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.1)
labels_train = LabelBinarizer().fit_transform(y_train).astype(np.float32)
labels_test = LabelBinarizer().fit_transform(y_test).astype(np.float32)
class MNist(rm.Model):
def __init__(self):
super(MNist, self).__init__()
# Import the modules
import os
from sklearn.externals import joblib
from sklearn import datasets
from skimage.feature import hog
from sklearn.svm import LinearSVC
import numpy as np
from collections import Counter
from sklearn_porter import Porter
from sklearn.model_selection import train_test_split
import cv2
# Load the dataset
custom_data_home = 'D:\Christian-Data\Proyectos\Python\data'
dataset = datasets.fetch_mldata('MNIST original', data_home=custom_data_home)
# Extract the features and labels
features = np.array(dataset.data, 'int16')
labels = np.array(dataset.target, 'int')
list_hog_fd = []
for feature in features:
fd = hog(feature.reshape((28, 28)),
orientations=9,
pixels_per_cell=(14, 14),
cells_per_block=(1, 1),
visualise=False)
list_hog_fd.append(fd)
hog_features = np.array(list_hog_fd, 'float64')
print("Features inicial:" + str(len(hog_features)))
print("Elementos inicial :" + str(labels.size))
# Import the modules
from sklearn.externals import joblib
from sklearn import datasets
from skimage.feature import hog
from sklearn.svm import LinearSVC
from sklearn.ensemble import RandomForestClassifier
import numpy as np
from collections import Counter
from sklearn.model_selection import GridSearchCV
# Load the dataset
dataset = datasets.fetch_mldata("MNIST Original",
data_home='/home/sahil/virtualenvs/ALPR/')
# Extract the features and labels
features = np.array(dataset.data, 'int16')
labels = np.array(dataset.target, 'int')
# Extract the hog features
list_hog_fd = []
for feature in features:
fd = hog(feature.reshape((28, 28)),
orientations=9,
pixels_per_cell=(14, 14),
cells_per_block=(1, 1),
visualise=False)
list_hog_fd.append(fd)
hog_features = np.array(list_hog_fd, 'float64')
print("Count of digits in dataset", Counter(labels))
# Create an linear SVM object
def get_MNIST():
"""Returns a (name, data, target) tuple of the MNIST dataset (70 000 items)"""
mnist = fetch_mldata('MNIST original', data_home='./data/')
return ('MNIST', pd.DataFrame(mnist.data / 255.), pd.DataFrame(mnist.target))
def get_mnist_data():
mnist = fetch_mldata('MNIST Original')
X = mnist['data']
y = mnist['target']
return random_split(X, y, ratio=0.2)
from sklearn import datasets
import numpy as np
from sklearn.svm import LinearSVC
from skimage.feature import hog
from sklearn.externals import joblib
from collections import Counter
dataset = datasets.fetch_mldata('MNIST Original')
features = np.array(dataset.data, 'int16')
labels = np.array(dataset.target, 'int')
list_hog_fd = []
for feature in features:
fd = hog(feature.reshape((28, 28)),
orientations=9,
pixels_per_cell=(14, 14),
cells_per_block=(1, 1))
list_hog_fd.append(fd)
hog_features = np.array(list_hog_fd, 'float64')
print('done with count', Counter(labels))
for i in range(1, 2, 1):
clf = LinearSVC(C=3.0, max_iter=5000, random_state=1, tol=1e-5)
clf.fit(hog_features, labels)
joblib.dump(clf,
'C:\\Users\\tusha\Desktop\ocrclf{}.pkl'.format(i),
compress=3)
print('{} done'.format(i))
import numpy as np
from matplotlib import pyplot as plt
from sklearn.gaussian_process import GaussianProcessRegressor
from sklearn.gaussian_process.kernels \
import RBF, WhiteKernel, RationalQuadratic, ExpSineSquared
from sklearn.datasets import fetch_mldata
data = fetch_mldata('mauna-loa-atmospheric-co2').data
X = data[:, [1]]
y = data[:, 0]
# Kernel with parameters given in GPML book
k1 = 66.0**2 * RBF(length_scale=67.0) # long term smooth rising trend
k2 = 2.4**2 * RBF(length_scale=90.0) \
* ExpSineSquared(length_scale=1.3, periodicity=1.0) # seasonal component
# medium term irregularity
k3 = 0.66**2 \
* RationalQuadratic(length_scale=1.2, alpha=0.78)
k4 = 0.18**2 * RBF(length_scale=0.134) \
+ WhiteKernel(noise_level=0.19**2) # noise terms
kernel_gpml = k1 + k2 + k3 + k4
gp = GaussianProcessRegressor(kernel=kernel_gpml,
alpha=0,
optimizer=None,
normalize_y=True)
gp.fit(X, y)
print("GPML kernel: %s" % gp.kernel_)
def train(self, n_epochs, batch_size=128, save_interval=50):
mnist = fetch_mldata('MNIST original')
X = mnist.data
y = mnist.target
# Rescale [-1, 1]
X = (X.astype(np.float32) - 127.5) / 127.5
half_batch = int(batch_size / 2)
for epoch in range(n_epochs):
# ---------------------
# Train Discriminator
# ---------------------
self.discriminator.set_trainable(True)
# Select a random half batch of images
idx = np.random.randint(0, X.shape[0], half_batch)
imgs = X[idx]
# Sample noise to use as generator input
noise = np.random.normal(0, 1, (half_batch, self.latent_dim))
# Generate a half batch of images
gen_imgs = self.generator.predict(noise)
# Valid = [1, 0], Fake = [0, 1]
valid = np.concatenate((np.ones(
(half_batch, 1)), np.zeros((half_batch, 1))),
axis=1)
fake = np.concatenate((np.zeros(
(half_batch, 1)), np.ones((half_batch, 1))),
axis=1)
# Train the discriminator
d_loss_real, d_acc_real = self.discriminator.train_on_batch(
imgs, valid)
d_loss_fake, d_acc_fake = self.discriminator.train_on_batch(
gen_imgs, fake)
d_loss = 0.5 * (d_loss_real + d_loss_fake)
d_acc = 0.5 * (d_acc_real + d_acc_fake)
# ---------------------
# Train Generator
# ---------------------
# We only want to train the generator for the combined model
self.discriminator.set_trainable(False)
# Sample noise and use as generator input
noise = np.random.normal(0, 1, (batch_size, self.latent_dim))
# The generator wants the discriminator to label the generated samples as valid
valid = np.concatenate((np.ones(
(batch_size, 1)), np.zeros((batch_size, 1))),
axis=1)
# Train the generator
g_loss, g_acc = self.combined.train_on_batch(noise, valid)
# Display the progress
print("%d [D loss: %f, acc: %.2f%%] [G loss: %f, acc: %.2f%%]" %
(epoch, d_loss, 100 * d_acc, g_loss, 100 * g_acc))
# If at save interval => save generated image samples
if epoch % save_interval == 0:
self.save_imgs(epoch)
# -*- coding: utf-8 -*-
from sklearn.datasets import fetch_mldata
from matplotlib.pyplot import *
from numpy import *
mnist = fetch_mldata('MNIST original')
data = array(mnist.data != 0, dtype=bool) # 二値化
# 適当に15サンプル表示
N = len(data)
choice = random.choice(arange(N), 15)
figure(figsize=(18, 8))
gray()
for i in range(15):
subplot(3, 5, i + 1)
imshow(data[choice[i]].reshape(28, 28), interpolation='none')
savefig('fig19-2.png')
from cnn.neural_network import CNN
from keras.utils import np_utils
from keras.optimizers import SGD
from sklearn.datasets import fetch_mldata
from sklearn.model_selection import train_test_split
# Parse the Arguments
ap = argparse.ArgumentParser()
ap.add_argument("-s", "--save_model", type=int, default=-1)
ap.add_argument("-l", "--load_model", type=int, default=-1)
ap.add_argument("-w", "--save_weights", type=str)
args = vars(ap.parse_args())
# Read/Download MNIST Dataset
print('Loading MNIST Dataset...')
dataset = fetch_mldata('MNIST Original')
# Read the MNIST data as array of 784 pixels and convert to 28x28 image matrix
mnist_data = dataset.data.reshape((dataset.data.shape[0], 28, 28))
mnist_data = mnist_data[:, np.newaxis, :, :]
# Divide data into testing and training sets.
train_img, test_img, train_labels, test_labels = train_test_split(
mnist_data / 255.0, dataset.target.astype("int"), test_size=0.1)
# Now each image rows and columns are of 28x28 matrix type.
img_rows, img_columns = 28, 28
# Transform training and testing data to 10 classes in range [0,classes] ; num. of classes = 0 to 9 = 10 classes
total_classes = 10 # 0 to 9 labels
train_labels = np_utils.to_categorical(train_labels, 10)