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aggregator.py
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aggregator.py
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import numpy as np
import glob
import sys
import pickle
import pandas as pd
import tensorflow as tf
from tensorflow.contrib.slim import fully_connected as fc
from vae_regression import VariantionalAutoencoder
from regressor import LogisticRegressor
class VariantionalAutoencoder2(object):
def __init__(self, learning_rate=1e-3, batch_size=100, n_z=10,vindim=100):
self.learning_rate = learning_rate
self.batch_size = batch_size
self.n_z = n_z
self.vindim = vindim
self.build()
self.sess = tf.InteractiveSession()
self.sess.run(tf.global_variables_initializer())
# Build the netowrk and the loss functions
def build(self):
self.x = tf.placeholder(name='x', dtype=tf.float32, shape=[None, self.vindim])
# Encode
# x -> z_mean, z_sigma -> z
f0 = fc(self.x, 30000, scope='enc_fc0', activation_fn=tf.nn.relu)
f1 = fc(f0, 15000, scope='enc_fc1', activation_fn=tf.nn.relu)
f2 = fc(f1, 10000, scope='enc_fc2', activation_fn=tf.nn.relu)
f3 = fc(f2, 2000, scope='enc_fc3', activation_fn=tf.nn.relu)
#f3 = fc(f3, 500, scope='enc_fc3', activation_fn=tf.nn.elu)
self.z_mu = fc(f3, self.n_z, scope='enc_fc4_mu', activation_fn=None)
self.z_log_sigma_sq = fc(f3, self.n_z, scope='enc_fc4_sigma', activation_fn=None)
eps = tf.random_normal(shape=tf.shape(self.z_log_sigma_sq),
mean=0, stddev=1, dtype=tf.float32)
#zzz = self.z_mu + tf.sqrt(tf.exp(self.z_log_sigma_sq)) * eps
#self.zzz = tf.Print(zzz,[zzz], message="my Z-values:")
self.z = self.z_mu + tf.sqrt(tf.exp(self.z_log_sigma_sq)) * eps
# Decode
# z -> x_hat
g1 = fc(self.z, 2000, scope='dec_fc1', activation_fn=tf.nn.relu)
g2 = fc(g1, 10000, scope='dec_fc2', activation_fn=tf.nn.relu)
g3 = fc(g2, 15000, scope='dec_fc3', activation_fn=tf.nn.relu)
g4 = fc(g3, 30000, scope='dec_fc4', activation_fn=tf.nn.relu)
self.x_hat = fc(g4, self.vindim, scope='dec_fc5', activation_fn=tf.sigmoid)
# Loss
# Reconstruction loss
# Minimize the cross-entropy loss
# H(x, x_hat) = -\Sigma x*log(x_hat) + (1-x)*log(1-x_hat)
epsilon = 1e-9
recon_loss = -tf.reduce_sum(
self.x * tf.log(epsilon+self.x_hat) + (1-self.x) * tf.log(epsilon+ (1-self.x_hat)),
axis=1
)
#recon_loss = tf.reduce_sum((self.x_hat-self.x)**2,axis=1)
#recon_loss = tf.nn.l2_loss(self.x_hat-self.x)
self.recon_loss = tf.reduce_mean(recon_loss)
# Latent loss
# Kullback Leibler divergence: measure the difference between two distributions
# Here we measure the divergence between the latent distribution and N(0, 1)
latent_loss = -0.5 * tf.reduce_sum(
1 + self.z_log_sigma_sq - tf.square(self.z_mu) - tf.exp(self.z_log_sigma_sq), axis=1)
self.latent_loss = tf.reduce_mean(latent_loss)
self.total_loss = tf.reduce_mean(latent_loss + recon_loss)
self.train_op = tf.train.RMSPropOptimizer(learning_rate=self.learning_rate).minimize(self.total_loss)
#self.train_op = tf.train.AdamOptimizer(
# learning_rate=self.learning_rate).minimize(self.total_loss)
return
# Execute the forward and the backward pass
def run_single_step(self, x):
_, loss, recon_loss, latent_loss = self.sess.run(
[self.train_op, self.total_loss, self.recon_loss, self.latent_loss],
feed_dict={self.x: x}
)
return loss, recon_loss, latent_loss
# x -> x_hat
def reconstructor(self, x):
x_hat = self.sess.run(self.x_hat, feed_dict={self.x: x})
return x_hat
# z -> x
def generator(self, z):
x_hat = self.sess.run(self.x_hat, feed_dict={self.z: z})
return x_hat
# x -> z
def transformer(self, x):
z = self.sess.run(self.z, feed_dict={self.x: x})
return z
class BatchMaker(object):
def __init__(self):
self.batch_number = -1
def load_data(self,data):
self.data = data
self.shuffle()
def shuffle(self):
self.current_q = np.random.permutation(self.data.shape[0])
self.head = 0
self.batch_number += 1
def get_batch(self,batch_size):
if self.current_q.shape[0]-self.head >= batch_size:
result = self.data[self.current_q[self.head:self.head+batch_size],:]
self.head += batch_size
return result
else:
if self.head == self.current_q.shape[0]:
self.shuffle()
self.head = batch_size
return self.data[self.current_q[:batch_size],:]
else:
result = self.data[self.current_q[self.head:],:]
self.shuffle()
return result
return None
def do_regression(vat,np_diags,epochs):
tf.reset_default_graph()
model = LogisticRegressor(learning_rate=1e-4,input_dim=vat.shape[1])
print('TRAINIG LATENT REGRESSOR:')
bm = BatchMaker()
bm.load_data(np.concatenate([vat,np_diags],axis=1))
while bm.batch_number < epochs:
batch = bm.get_batch(100)
loss = model.run_single_step(batch[:,:vat.shape[1]],batch[:,-1:])
if bm.batch_number % 5 == 0:
print('[Epoch {}] Loss: {}'.format(bm.batch_number, loss))
labels = model.classifier(vat)
latent_reg_acc = np.sum(labels[:] == np_diags[:,0])/np_diags.shape[0]
print('Latent Regressor Accuracy is :',latent_reg_acc)
return model
results = []
counts = {}
total_count = 0
feature_count = 56963
list_of_sample_directories = glob.glob('./'+'TCGA_*/')
for directory in list_of_sample_directories:
all_samples = glob.glob(directory+'*TCGA*.csv')
counts[directory] = len(all_samples)
total_count += len(all_samples)
counter = 0
sample_mat = np.zeros((total_count,feature_count))
all_names = []
for directory in list_of_sample_directories:
all_samples = glob.glob(directory+'*TCGA*.csv')
for sample in all_samples:
all_names.append(sample)
with open(sample,'r') as sample_file:
line_counter = 0
for line in sample_file:
sample_mat[counter,line_counter] = line.strip().split('\t')[1]
line_counter += 1
counter += 1
min_val = np.min(sample_mat,axis=0)
max_val = np.max(sample_mat,axis=0)
new_mat = sample_mat[:,~(max_val-min_val == 0)]
np.save('invalids.npy',max_val-min_val == 0)
min_val = np.min(new_mat,axis=0)
max_val = np.max(new_mat,axis=0)
normalized_mat = (new_mat-min_val)/(max_val-min_val)
tf.reset_default_graph()
vindim = 55682#normalized_mat.shape[1]
model = VariantionalAutoencoder2(learning_rate=1e-4, batch_size=100, n_z=500,vindim=vindim)
dataset = BatchMaker()
dataset.load_data(normalized_mat)
counter = 0
loss_list = []
while dataset.batch_number < 10:
loss = model.run_single_step(dataset.get_batch(20))
counter += 1
if counter % 5 == 0 :
print(loss)
loss_list.append(loss)
saver = tf.train.Saver()
saver.save(model.sess,'vae_all_rms.ckpt')
transformed = model.transformer(normalized_mat)
diags = np.zeros((transformed.shape[0],1))
counter = 0
for directory in list_of_sample_directories:
all_samples = glob.glob(directory+'*TCGA*.csv')
for sample in all_samples:
if 'cancer' in sample:
diags[counter] = 1
elif 'normal' in sample:
diags[counter] = 0
else:
print("ERRROOORRR")
counter += 1
head_counter = 0
list_of_models = []
list_of_ex_sample = []
for item in list_of_sample_directories:
sample_count = counts[item]
vat = transformed[head_counter:head_counter+sample_count]
model = do_regression(vat,diags[head_counter:head_counter+sample_count,:],550)
w = model.sess.run(model.W)
b = model.sess.run(model.b)
dists = vat.dot(w) + b
max_point = vat[np.argmax(dists),:]
min_point = vat[np.argmin(dists),:]
cov = np.eye(500)
cov = cov*0.2
max_rand = np.random.multivariate_normal(max_point,cov,200)
min_rand = np.random.multivariate_normal(min_point,cov,200)
list_of_models.append((w,b))
list_of_ex_sample.append((max_rand,min_rand))
list_of_ex_real = []
for item in list_of_ex_sample:
list_of_ex_real.append(np.concatenate([model.generator(item[0]),model.generator(item[1])],axis=0))
tf.reset_default_graph()
vindim = 55682#normalized_mat.shape[1]
model = VariantionalAutoencoder2(learning_rate=1e-4, batch_size=100, n_z=500,vindim=vindim)
saver = tf.train.Saver()
temp_mod = saver.restore(model.sess,'vae_all_rms.ckpt')
dummy = np.zeros((400,1))
dummy[:200]+=1
list_of_ws = []
for item in list_of_ex_real:
new_item = (item-np.mean(item,axis=0))/np.std(item,axis=0)
print(new_item.shape)
model = do_regression(new_item,dummy,550)
w = model.sess.run(model.W)
b = model.sess.run(model.b)
list_of_ws.append(w)
invalid = np.load('invalids.npy')
names = np.load('names.npy')
final_names = names[~invalid]
for i in range(len(list_of_ws)):
sortedargs = np.argsort(-np.fabs(list_of_ws[i][:,0]))
with open('RANKINGS_'+list_of_sample_directories[i][7:-1]+'_NORM_20_batch','w') as outputfile:
for item in sortedargs :
outputfile.write(final_names[item]+'\n')