Tensorflow sommerliche merge-Fehler : - Form [-1,784] hat negative Dimensionen

Ich versuche, eine Zusammenfassung über einen Trainingsprozess des neuronalen Netzes unten.

import tensorflow as tf 
import numpy as np 

from tensorflow.examples.tutorials.mnist import input_data

mnist = input_data.read_data_sets(".\MNIST",one_hot=True)

# Create the model
def train_and_test(hidden1,hidden2, learning_rate, epochs, batch_size):

    with tf.name_scope("first_layer"):
        input_data = tf.placeholder(tf.float32, [batch_size, 784], name = "input")
        weights1  = tf.Variable(
        tf.random_normal(shape =[784, hidden1],stddev=0.1),name = "weights")
        bias = tf.Variable(tf.constant(0.0,shape =[hidden1]), name = "bias")
        activation = tf.nn.relu(
        tf.matmul(input_data, weights1) + bias, name = "relu_act")
        tf.summary.histogram("first_activation", activation)

    with tf.name_scope("second_layer"):
        weights2  = tf.Variable(
        tf.random_normal(shape =[hidden1, hidden2],stddev=0.1),
        name = "weights")
        bias2 = tf.Variable(tf.constant(0.0,shape =[hidden2]), name = "bias")
        activation2 = tf.nn.relu(
        tf.matmul(activation, weights2) + bias2, name = "relu_act")
        tf.summary.histogram("second_activation", activation2)

    with tf.name_scope("output_layer"):
        weights3 = tf.Variable(
            tf.random_normal(shape=[hidden2, 10],stddev=0.5), name = "weights")
        bias3 = tf.Variable(tf.constant(1.0, shape =[10]), name = "bias")
        output = tf.add(
        tf.matmul(activation2, weights3, name = "mul"), bias3, name = "output")
        tf.summary.histogram("output_activation", output)
    y_ = tf.placeholder(tf.float32, [batch_size, 10])

    with tf.name_scope("loss"):
        cross_entropy = tf.reduce_mean(
        tf.nn.softmax_cross_entropy_with_logits(labels=y_, logits=output))
        tf.summary.scalar("cross_entropy", cross_entropy)
    with tf.name_scope("train"):
        train_step = tf.train.GradientDescentOptimizer(learning_rate).minimize(cross_entropy)

    with tf.name_scope("tests"):
        correct_prediction = tf.equal(tf.argmax(output, 1), tf.argmax(y_, 1))
        accuracy = tf.reduce_mean(tf.cast(correct_prediction, tf.float32))

    summary_op = tf.summary.merge_all()

    sess = tf.InteractiveSession()
    writer = tf.summary.FileWriter("./data", sess.graph)
    tf.global_variables_initializer().run()

    # Train
    for i in range(epochs):
        batch_xs, batch_ys = mnist.train.next_batch(batch_size)
         _, summary = sess.run([train_step,summary_op], feed_dict={input_data: batch_xs, y_: batch_ys})
     writer.add_summary(summary)

     if i % 10 ==0:
          test_xs, test_ys = mnist.train.next_batch(batch_size)
          test_accuracy = sess.run(accuracy, feed_dict = {input_data : test_xs, y_ : test_ys})
    writer.close()
    return test_accuracy

if __name__ =="__main__":
print(train_and_test(500, 200, 0.001, 10000, 100))

Teste ich das Modell alle 10 Schritt einen zufälligen Stapel von test-Daten.
Das problem ist in der sommerlichen Schriftsteller. Der sess.run() innerhalb der for-Schleife wirft folgenden Fehler.

    Traceback (most recent call last):

  File "<ipython-input-18-78c88c8e6471>", line 1, in <module>
    runfile('C:/Users/Suman 
Nepal/Documents/Projects/MNISTtensorflow/mnist.py', wdir='C:/Users/Suman 
Nepal/Documents/Projects/MNISTtensorflow')

  File "C:\Users\Suman Nepal\Anaconda3\lib\site-
packages\spyder\utils\site\sitecustomize.py", line 880, in runfile
execfile(filename, namespace)

  File "C:\Users\Suman Nepal\Anaconda3\lib\site-
packages\spyder\utils\site\sitecustomize.py", line 102, in execfile
exec(compile(f.read(), filename, 'exec'), namespace)

  File "C:/Users/Suman Nepal/Documents/Projects/MNISTtensorflow/mnist.py", line 68, in <module>
    print(train_and_test(500, 200, 0.001, 100, 100))

  File "C:/Users/Suman Nepal/Documents/Projects/MNISTtensorflow/mnist.py", line 58, in train_and_test
    _, summary = sess.run([train_step,summary_op], feed_dict={input_data: batch_xs, y_: batch_ys})

  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\tensorflow\python\client\session.py", line 789, in run
    run_metadata_ptr)

  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\tensorflow\python\client\session.py", line 997, in _run
feed_dict_string, options, run_metadata)

  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\tensorflow\python\client\session.py", line 1132, in _do_run
target_list, options, run_metadata)

  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\tensorflow\python\client\session.py", line 1152, in _do_call
raise type(e)(node_def, op, message)

InvalidArgumentError: Shape [-1,784] has negative dimensions
 [[Node: first_layer_5/input = Placeholder[dtype=DT_FLOAT, shape=[?,784], _device="/job:localhost/replica:0/task:0/cpu:0"]()]]

Caused by op 'first_layer_5/input', defined at:
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\spyder\utils\ipython\start_kernel.py", line 231, in <module>
main()
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\spyder\utils\ipython\start_kernel.py", line 227, in main
kernel.start()
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\ipykernel\kernelapp.py", line 477, in start
ioloop.IOLoop.instance().start()
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\zmq\eventloop\ioloop.py", line 177, in start
super(ZMQIOLoop, self).start()
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\tornado\ioloop.py", line 888, in start
handler_func(fd_obj, events)
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\tornado\stack_context.py", line 277, in null_wrapper
return fn(*args, **kwargs)
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\zmq\eventloop\zmqstream.py", line 440, in _handle_events
self._handle_recv()
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\zmq\eventloop\zmqstream.py", line 472, in _handle_recv
self._run_callback(callback, msg)
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\zmq\eventloop\zmqstream.py", line 414, in _run_callback
callback(*args, **kwargs)
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\tornado\stack_context.py", line 277, in null_wrapper
return fn(*args, **kwargs)
 File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\ipykernel\kernelbase.py", line 283, in dispatcher
return self.dispatch_shell(stream, msg)
 File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\ipykernel\kernelbase.py", line 235, in dispatch_shell
handler(stream, idents, msg)
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\ipykernel\kernelbase.py", line 399, in execute_request
user_expressions, allow_stdin)
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\ipykernel\ipkernel.py", line 196, in do_execute
res = shell.run_cell(code, store_history=store_history, silent=silent)
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\ipykernel\zmqshell.py", line 533, in run_cell
return super(ZMQInteractiveShell, self).run_cell(*args, **kwargs)
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py", line 2717, in run_cell
interactivity=interactivity, compiler=compiler, result=result)
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py", line 2827, in run_ast_nodes
if self.run_code(code, result):
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py", line 2881, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-8-78c88c8e6471>", line 1, in <module>
runfile('C:/Users/Suman Nepal/Documents/Projects/MNISTtensorflow/mnist.py', wdir='C:/Users/Suman Nepal/Documents/Projects/MNISTtensorflow')
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\spyder\utils\site\sitecustomize.py", line 880, in runfile
execfile(filename, namespace)
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\spyder\utils\site\sitecustomize.py", line 102, in execfile
exec(compile(f.read(), filename, 'exec'), namespace)
  File "C:/Users/Suman Nepal/Documents/Projects/MNISTtensorflow/mnist.py", line 86, in <module>
  File "C:/Users/Suman Nepal/Documents/Projects/MNISTtensorflow/mnist.py", line 12, in train_and_test
   input_data = tf.placeholder(tf.float32, [None, 784], name = "input")
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\tensorflow\python\ops\array_ops.py", line 1530, in placeholder
return gen_array_ops._placeholder(dtype=dtype, shape=shape, name=name)
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\tensorflow\python\ops\gen_array_ops.py", line 1954, in _placeholder
name=name)
  File "C:\Users\Suman Nepal\Anaconda3\lib\site-packages\tensorflow\python\framework\op_def_library.py", line 767, in apply_op
op_def=op_def)
  File "C:\Users\Suman Nepal\Anaconda3\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:\Users\Suman Nepal\Anaconda3\lib\site-packages\tensorflow\python\framework\ops.py", line 1269, in __init__
self._traceback = _extract_stack()

InvalidArgumentError (see above for traceback): Shape [-1,784] has negative dimensions
     [[Node: first_layer_5/input = Placeholder[dtype=DT_FLOAT, shape=[?,784], _device="/job:localhost/replica:0/task:0/cpu:0"]()]]

Wenn ich alle gelöscht die Zusammenfassung der Autoren und Zusammenfassung das Modell gut läuft.
Können Sie mir helfen, Stelle hier das problem? Ich versuchte Manipulation der Formen von Tensoren aber nirgendwo.

Es war das problem mit IPython console. Wenn Sie ähnliche Probleme haben wickeln Sie den gesamten code in tf.Graph() B. g und ausführen Sitzung in das Diagramm.

InformationsquelleAutor | 2017-06-22

tensorboard tensorflow

3

Aus einem Kommentar der gelöschten Antwort, von der original-poster:

Baue ich tatsächlich ein neuronales Netz unter with tf.Graph() as g. Ich entfernte die interaktive Sitzung und die Sitzung begann wie with tf.Session(g) as sess. Das problem behoben.

Diagramm g war nicht als Standard markiert Diagramm, das die Art und Weise, so ist die Sitzung (tf.InteractiveSession im original-code) verwenden würde, ein anderes Diagramm statt.

Beachten Sie, dass ich stolperte über hier wegen der gleichen Fehlermeldung. In meinem Fall hatte ich versehentlich so etwas wie dieses:
```
input_data = tf.placeholder(tf.float32, shape=(None, 50))
input_data = tf.tanh(input_data)
session.run(..., feed_dict={input_data: ...})
```
I. e. Ich wusste nicht, füttern Sie die Platzhalter. Es scheint, dass einige andere mathematische Operationen können dann das Ergebnis in dieser verwirrenden Fehler intern eine Undefinierte dimension wird dargestellt als -1.

InformationsquelleAutor Albert
1

War ich auch mit diesem problem. Auf der Suche rund um den Grundkonsens ist zu prüfen, für Probleme, die irgendwo in Ihrem code.

Fest, was es für mich war, ich war dabei ein sess.run(summary_op) ohne Fütterung in den Daten für mein Platzhalter.

Tensorflow scheint ein bisschen seltsam mit Platzhaltern, die Sie oft nicht Verstand, die Sie nicht füttern, wenn Sie versuchen zu beurteilen, Teil der Grafik, die ist von Ihnen unabhängig. Hier allerdings Tat er es.

InformationsquelleAutor Fergal

Dies hat möglicherweise zu tun mit der InteractiveSession Initialisierung.

Ich initialisiert es am Anfang und dann hat es geklappt - dann initialisiert die globalen Variablen, die innerhalb der Sitzung.

Ich bin nicht in der Lage, den Fehler zu reproduzieren mit dem alten code, das macht es unberechenbar oder caching-Einstellungen irgendwo.

import tensorflow as tf
sess = tf.InteractiveSession()


from tensorflow.examples.tutorials.mnist import input_data

mnist = input_data.read_data_sets("MNIST_data/", one_hot=True)

x = tf.placeholder(tf.float32, [None, 784])

W = tf.Variable(tf.zeros([784,10]))

b = tf.Variable(tf.zeros([10]))

y = tf.nn.softmax(tf.matmul(x, W)+b)

y_ = tf.placeholder(tf.float32, [None,10])



cross_entropy = tf.reduce_mean(-tf.reduce_sum(y_ * tf.log(y), reduction_indices=[1]))
train_step = tf.train.GradientDescentOptimizer(0.05).minimize(cross_entropy)
sess.run(tf.global_variables_initializer())


for _ in range(1000):
    batch_xs, batch_ys = mnist.train.next_batch(100)
    #print batch_xs.shape, batch_ys.shape
    sess.run(train_step, feed_dict={x: batch_xs, y_: batch_ys})

InformationsquelleAutor RK_

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