在一次热编码后，Tensorflow中的logits和lables之间存在不匹配。 我的批量大小是256.如何设置标签Tensor中的批量大小？我想这个问题与LabelEncoder和one-hot编码器有关。任何帮助都很明显。
请找到以下代码。
from sklearn import preprocessing
le = preprocessing.LabelEncoder()
cost = tf.reduce_mean(tf.nn.softmax_cross_entropy_with_logits(logits = logits, labels = tf.one_hot(le.fit_transform(labels), n_classes)))
optimizer = tf.train.GradientDescentOptimizer(learning_rate = learn_rate).minimize(cost)
correct_prediction = tf.equal(tf.argmax(logits,1), tf.argmax(tf.one_hot(le.fit_transform(labels), n_classes),1))
accuracy = tf.reduce_mean(tf.cast(correct_prediction, tf.float32))
batchSize = 256
epochs = 20 # 200epoch+.5lr = 99.6
init = tf.global_variables_initializer()
with tf.Session() as sess:
sess.run(init)
total_batches = batches(batchSize, train_features, train_labels)
for epoch in range(epochs):
for batch_features, batch_labels in total_batches:
train_data = {features: batch_features, labels : batch_labels, keep_prob : 0.5}
sess.run(optimizer, feed_dict = train_data)
# Print status for every 100 epochs
if epoch % 10 == 0:
valid_accuracy = sess.run(
accuracy,
feed_dict={
features: val_features,
labels: val_labels,
keep_prob : 0.5})
print('Epoch {:<3} - Validation Accuracy: {}'.format(
epoch,
valid_accuracy))
Accuracy = sess.run(accuracy, feed_dict={features : test_features, labels :test_labels, keep_prob : 1.0})
# Save the model
saver.save(sess, save_file)
print('Trained Model Saved.')
prediction=tf.argmax(logits,1)
output_array = le.inverse_transform(prediction.eval(feed_dict={features : test_features, keep_prob: 1.0}))
prediction = np.reshape(prediction, (test_features.shape[0],1))
np.savetxt("prediction.csv", prediction, delimiter=",")
我收到了无效的参数错误，如下所示。
InvalidArgumentError: logits and labels must be same size: logits_size=[256,1161] labels_size=[1,1161]
[[Node: SoftmaxCrossEntropyWithLogits = SoftmaxCrossEntropyWithLogits[T=DT_FLOAT, _device="/job:localhost/replica:0/task:0/gpu:0"](Reshape, Reshape_1)]]
Caused by op 'SoftmaxCrossEntropyWithLogits', defined at:
File "C:\Anaconda\envs\gpu\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "C:\Anaconda\envs\gpu\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:\Anaconda\envs\gpu\lib\site-packages\ipykernel\__main__.py", line 3, in <module>
app.launch_new_instance()
File "C:\Anaconda\envs\gpu\lib\site-packages\traitlets\config\application.py", line 658, in launch_instance
app.start()
File "C:\Anaconda\envs\gpu\lib\site-packages\ipykernel\kernelapp.py", line 477, in start
ioloop.IOLoop.instance().start()
File "C:\Anaconda\envs\gpu\lib\site-packages\zmq\eventloop\ioloop.py", line 177, in start
super(ZMQIOLoop, self).start()
File "C:\Anaconda\envs\gpu\lib\site-packages\tornado\ioloop.py", line 888, in start
handler_func(fd_obj, events)
File "C:\Anaconda\envs\gpu\lib\site-packages\tornado\stack_context.py", line 277, in null_wrapper
return fn(*args, **kwargs)
File "C:\Anaconda\envs\gpu\lib\site-packages\zmq\eventloop\zmqstream.py", line 440, in _handle_events
self._handle_recv()
File "C:\Anaconda\envs\gpu\lib\site-packages\zmq\eventloop\zmqstream.py", line 472, in _handle_recv
self._run_callback(callback, msg)
File "C:\Anaconda\envs\gpu\lib\site-packages\zmq\eventloop\zmqstream.py", line 414, in _run_callback
callback(*args, **kwargs)
File "C:\Anaconda\envs\gpu\lib\site-packages\tornado\stack_context.py", line 277, in null_wrapper
return fn(*args, **kwargs)
File "C:\Anaconda\envs\gpu\lib\site-packages\ipykernel\kernelbase.py", line 283, in dispatcher
return self.dispatch_shell(stream, msg)
File "C:\Anaconda\envs\gpu\lib\site-packages\ipykernel\kernelbase.py", line 235, in dispatch_shell
handler(stream, idents, msg)
File "C:\Anaconda\envs\gpu\lib\site-packages\ipykernel\kernelbase.py", line 399, in execute_request
user_expressions, allow_stdin)
File "C:\Anaconda\envs\gpu\lib\site-packages\ipykernel\ipkernel.py", line 196, in do_execute
res = shell.run_cell(code, store_history=store_history, silent=silent)
File "C:\Anaconda\envs\gpu\lib\site-packages\ipykernel\zmqshell.py", line 533, in run_cell
return super(ZMQInteractiveShell, self).run_cell(*args, **kwargs)
File "C:\Anaconda\envs\gpu\lib\site-packages\IPython\core\interactiveshell.py", line 2698, in run_cell
interactivity=interactivity, compiler=compiler, result=result)
File "C:\Anaconda\envs\gpu\lib\site-packages\IPython\core\interactiveshell.py", line 2802, in run_ast_nodes
if self.run_code(code, result):
File "C:\Anaconda\envs\gpu\lib\site-packages\IPython\core\interactiveshell.py", line 2862, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File "<ipython-input-5-9a6fe2134e3e>", line 52, in <module>
cost = tf.reduce_mean(tf.nn.softmax_cross_entropy_with_logits(logits = logits, labels = tf.one_hot(le.fit_transform(labels), n_classes)))
File "C:\Anaconda\envs\gpu\lib\site-packages\tensorflow\python\ops\nn_ops.py", line 1594, in softmax_cross_entropy_with_logits
precise_logits, labels, name=name)
File "C:\Anaconda\envs\gpu\lib\site-packages\tensorflow\python\ops\gen_nn_ops.py", line 2380, in _softmax_cross_entropy_with_logits
features=features, labels=labels, name=name)
File "C:\Anaconda\envs\gpu\lib\site-packages\tensorflow\python\framework\op_def_library.py", line 767, in apply_op
op_def=op_def)
File "C:\Anaconda\envs\gpu\lib\site-packages\tensorflow\python\framework\ops.py", line 2506, in create_op
original_op=self._default_original_op, op_def=op_def)
File "C:\Anaconda\envs\gpu\lib\site-packages\tensorflow\python\framework\ops.py", line 1269, in __init__
self._traceback = _extract_stack()
InvalidArgumentError (see above for traceback): logits and labels must be same size: logits_size=[256,1161] labels_size=[1,1161]
[[Node: SoftmaxCrossEntropyWithLogits = SoftmaxCrossEntropyWithLogits[T=DT_FLOAT, _device="/job:localhost/replica:0/task:0/gpu:0"](Reshape, Reshape_1)]]
答案 0 :(得分：0)
问题在于tf.one_hot（le.fit_transform（标签），n_classes）。
这会传递一个需要numpy数组的张量。在为此Tensor调用eval（）之后，问题已解决。