Python 损失函数返回nan tensorflow
我在这里编写了一个简单的tensorflow程序,它读取一个特性列表并尝试预测类Python 损失函数返回nan tensorflow,python,machine-learning,tensorflow,deep-learning,Python,Machine Learning,Tensorflow,Deep Learning,我在这里编写了一个简单的tensorflow程序,它读取一个特性列表并尝试预测类 with tf.Session() as sess: sess.run(tf.initialize_all_variables()) for epoch in range (hm_epochs): epoch_loss = 0 itere = int(X_train.shape[0]/batch_size) l
with tf.Session() as sess:
sess.run(tf.initialize_all_variables())
for epoch in range (hm_epochs):
epoch_loss = 0
itere = int(X_train.shape[0]/batch_size)
last = 0
add = 1
for start in range(itere):
x_train_epoch = X_train[last: ((start + add) * batch_size),:]
y_train_epoch = y_1Hot_train.eval()[last: ((start + add) * batch_size),:]
# print("shape of x", x_train_epoch.shape, "shape of y", y_train_epoch.shape)
_, c = sess.run([optimizer, cost], feed_dict = {x: x_train_epoch, y: y_train_epoch})
epoch_loss += c
last = start * batch_size
add = 0
print('Epoch', epoch, 'completed out of', hm_epochs, 'loss', epoch_loss )
correct = tf.equal(tf.argmax(prediction, 1), tf.argmax(y, 1))
accuracy = tf.reduce_mean(tf.cast(correct, 'float'))
print('Accuracy:', accuracy.eval( {x: X_test, y: y_1Hot_test.eval() }))
链接:
数据文件:
然而,当我运行代码时,我总是丢失“nan”。我不知道发生了什么。。。任何帮助都将不胜感激
WARNING:tensorflow:From <ipython-input-149-0164f4af7d52>:46: initialize_all_variables (from tensorflow.python.ops.variables) is deprecated and will be removed after 2017-03-02.
Instructions for updating:
Use `tf.global_variables_initializer` instead.
Epoch 0 completed out of 10 loss nan
Epoch 1 completed out of 10 loss nan
Epoch 2 completed out of 10 loss nan
Epoch 3 completed out of 10 loss nan
Epoch 4 completed out of 10 loss nan
Epoch 5 completed out of 10 loss nan
Epoch 6 completed out of 10 loss nan
Epoch 7 completed out of 10 loss nan
Epoch 8 completed out of 10 loss nan
Epoch 9 completed out of 10 loss nan
Accuracy: 0.589097
警告:tensorflow:From:46:initialize_所有_变量(来自tensorflow.python.ops.variables)已弃用,将在2017-03-02之后删除。
更新说明:
改用'tf.global\u variables\u initializer'。
第0纪元在10次损失中完成
第1纪元在10次损失中完成
第二纪元在10次损失中完成
第三纪元在10次损失中完成
第4纪元在10次损失中完成
第5纪元在10次损失中完成
第6纪元在10次损失中完成
第7纪元在10次损失中完成
第8纪元在10次损失中完成
第9纪元在10次损失中完成
准确度:0.589097
- 输入有nan,通过
X[np.isnan(X)]=0来修正它
- 输入未缩放,请使用sklearn的
对输入进行规范化StandardScaler
- 将权重设置为一个小的初始值,使用随机_normal中的stddev
- 修复输出计算中的错误:
output=tf.add(tf.matmul(l3,输出层['weights')),输出层['biases'))