Á¦ ¸ñ: MNIST tf ½ÇÇà ÆÄÀÏ |
ÀÌ ¸§: ½Åº´Ãá |
ÀÛ¼ºÀÏÀÚ: 2019.07.05 - 18:00 |
# mnist_tf.py import tensorflow as tf from tensorflow.examples.tutorials.mnist import input_data # import input_data mnist = input_data.read_data_sets("MNIST_data/", one_hot=True) x = tf.placeholder("float", [None, 784]) W = tf.Variable(tf.zeros([784,10])) b = tf.Variable(tf.zeros([10])) matm=tf.matmul(x,W) y = tf.nn.softmax(tf.matmul(x,W) + b) y_ = tf.placeholder("float", [None,10]) cross_entropy = -tf.reduce_sum(y_*tf.log(y)) train_step = tf.train.GradientDescentOptimizer(0.01).minimize(cross_entropy) sess = tf.Session() sess.run(tf.global_variables_initializer()) for i in range(1000): batch_xs, batch_ys = mnist.train.next_batch(100) sess.run(train_step, feed_dict={x: batch_xs, y_: batch_ys}) correct_prediction = tf.equal(tf.argmax(y,1), tf.argmax(y_,1)) accuracy = tf.reduce_mean(tf.cast(correct_prediction, "float")) vacc = sess.run(accuracy, feed_dict={x: mnist.test.images, y_: mnist.test.labels}) if i % 20 == 0: print( i,'-th iteration : accuracy = ', vacc ) if vacc >= 0.90: break |