Building Machine Learning Projects with TensorFlow by 2016
Author:2016
Language: eng
Format: mobi, epub
Publisher: Packt Publishing
X = tf.placeholder("float") Y = tf.placeholder("float") # Create first hidden layer hw1 = tf.Variable(tf.random_normal([1, 10], stddev=0.1)) # Create output connection ow = tf.Variable(tf.random_normal([10, 1], stddev=0.0)) # Create bias b = tf.Variable(tf.random_normal([10], stddev=0.1)) model_y = model(X, hw1, b, ow) # Cost function cost = tf.pow(model_y-Y, 2)/(2) # construct an optimizer train_op = tf.train.GradientDescentOptimizer(0.05).minimize(cost) # Launch the graph in a session with tf.Session() as sess: tf.initialize_all_variables().run() #Initialize all variables for i in range(1,100): dsX, dsY = shuffle (dsX.transpose(), dsY) #We randomize the samples to mplement a better training trainX, trainY =dsX[0:trainsamples], dsY[0:trainsamples] for x1,y1 in zip (trainX, trainY): sess.run(train_op, feed_dict={X: [[x1]], Y: y1}) testX, testY = dsX[trainsamples:trainsamples + testsamples], dsY[0:trainsamples:trainsamples+testsamples] cost1=0. for x1,y1 in zip (testX, testY): cost1 += sess.run(cost, feed_dict={X: [[x1]], Y: y1}) / testsamples if (i%10 == 0): print "Average cost for epoch " + str (i) + ":" + str(cost1)
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Building Machine Learning Projects with TensorFlow by 2016.epub
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