【发布时间】：2016-09-13 11:22:45
【问题描述】：
我在启动训练器时遇到问题，但无法找出原因。
我的输入数据的维度是 42，我的输出应该是 4 中的一个值。
这是我的训练和测试集的形状：
Training set:
input = (1152, 42) target = (1152,)
Training set: input = (1152, 42) target = (1152,)
Test set: input = (384, 42) target = (384,)
这是我的网络建设：
ls = MS.GradientDescent(lr=0.01)
cost = MC.CrossEntropy()
i = ML.Input(42, name='inp')
h = ML.Hidden(23, activation=MA.Sigmoid(), initializations=[MI.GlorotTanhInit()], name="hid")
o = ML.SoftmaxClassifier(4, learningScenario=ls, costObject=cost, name="out")
mlp = i > h > o
这是数据集、训练器和记录器的构造：
trainData = MDM.RandomSeries(distances = train_set[0], next_state = train_set[1])
trainMaps = MDM.DatasetMapper()
trainMaps.mapInput(i, trainData.distances)
trainMaps.mapOutput(o, trainData.next_state)
testData = MDM.RandomSeries(distances = test_set[0], next_state = test_set[1])
testMaps = MDM.DatasetMapper()
testMaps.mapInput(i, testData.distances)
testMaps.mapOutput(o, testData.next_state)
earlyStop = MSTOP.GeometricEarlyStopping(testMaps, patience=100, patienceIncreaseFactor=1.1, significantImprovement=0.00001, outputFunction="score", outputLayer=o)
epochWall = MSTOP.EpochWall(1000)
trainer = MT.DefaultTrainer(
trainMaps=trainMaps,
testMaps=testMaps,
validationMaps=None,
stopCriteria=[earlyStop, epochWall],
testFunctionName="testAndAccuracy",
trainMiniBatchSize=MT.DefaultTrainer.ALL_SET,
saveIfMurdered=False
)
recorder = MREC.GGPlot2("MLP", whenToSave = [MREC.SaveMin("test", o.name, "score")], printRate=1, writeRate=1)
trainer.start("MLP", mlp, recorder = recorder)
但是正在产生以下错误：
Traceback (most recent call last):
File "nn-mariana.py", line 82, in <module>
trainer.start("MLP", mlp, recorder = recorder)
File "SUPRESSED/Mariana/Mariana/training/trainers.py", line 226, in start
Trainer_ABC.start( self, runName, model, recorder, trainingOrder, moreHyperParameters )
File "SUPRESSED/Mariana/Mariana/training/trainers.py", line 110, in start
return self.run(runName, model, recorder, *args, **kwargs)
File "SUPRESSED/Mariana/Mariana/training/trainers.py", line 410, in run
outputLayers
File "SUPRESSED/Mariana/Mariana/training/trainers.py", line 269, in _trainTest
res = modelFct(output, **kwargs)
File "SUPRESSED/Mariana/Mariana/network.py", line 47, in __call__
return self.callTheanoFct(outputLayer, **kwargs)
File "SUPRESSED/Mariana/Mariana/network.py", line 44, in callTheanoFct
return self.outputFcts[ol](**kwargs)
File "SUPRESSED/Mariana/Mariana/wrappers.py", line 110, in __call__
return self.run(**kwargs)
File "SUPRESSED/Mariana/Mariana/wrappers.py", line 102, in run
fres = iter(self.theano_fct(*self.fctInputs.values()))
File "SUPRESSED/Theano/theano/compile/function_module.py", line 871, in __call__
storage_map=getattr(self.fn, 'storage_map', None))
File "SUPRESSED/Theano/theano/gof/link.py", line 314, in raise_with_op
reraise(exc_type, exc_value, exc_trace)
File "SUPRESSED/Theano/theano/compile/function_module.py", line 859, in __call__
outputs = self.fn()
ValueError: Input dimension mis-match. (input[0].shape[1] = 1152, input[1].shape[1] = 4)
Apply node that caused the error: Elemwise{Composite{((i0 * i1) + (i2 * log(i3)))}}[(0, 1)](InplaceDimShuffle{x,0}.0, LogSoftmax.0, Elemwise{sub,no_inplace}.0, Elemwise{sub,no_inplace}.0)
Toposort index: 18
Inputs types: [TensorType(int32, row), TensorType(float64, matrix), TensorType(int32, row), TensorType(float64, matrix)]
Inputs shapes: [(1, 1152), (1152, 4), (1, 1152), (1152, 4)]
Inputs strides: [(4608, 4), (32, 8), (4608, 4), (32, 8)]
Inputs values: ['not shown', 'not shown', 'not shown', 'not shown']
Outputs clients: [[Sum{axis=[1], acc_dtype=float64}(Elemwise{Composite{((i0 * i1) + (i2 * log(i3)))}}[(0, 1)].0)]]
版本：
Mariana (1.0.1rc1, /media/guilhermevrs/Data/Documentos/Academico/TCC-code/Mariana)
Theano (0.8.0.dev0, SUPRESSED/Theano)
此代码是根据 mnist 示例中的教程代码生成的。
你能帮我弄清楚发生了什么吗？
提前谢谢你
【问题讨论】：
标签： python-2.7 neural-network theano