InvalidArgumentError：不兼容的形状：[2240,17]与[32,17]

问题描述

from keras import backend as K
from keras.engine.topology import Layer
from keras.initializers import RandomUniform,Initializer,Constant
import numpy as np


class InitCentersRandom(Initializer):
""" Initializer for initialization of centers of RBF network
    as random samples from the given data set.
# Arguments
    X: matrix,dataset to choose the centers from (random rows
      are taken as centers)
"""

def __init__(self,X):
    self.X = X

def __call__(self,shape,dtype=None):
    assert shape[1] == self.X.shape[1]
    idx = np.random.randint(self.X.shape[0],size=shape[0])
    return self.X[idx,:]

类RBFLayer（Layer）：

def __init__(self,output_dim,initializer=None,betas=1.0,**kwargs):
    self.output_dim = output_dim
    self.init_betas = betas
    if not initializer:
        self.initializer = RandomUniform(0.0,1.0)
    else:
        self.initializer = initializer
    super(RBFLayer,self).__init__(**kwargs)

def build(self,input_shape):

    self.centers = self.add_weight(name='centers',shape=(self.output_dim,input_shape[1]),initializer=self.initializer,trainable=True)
    self.betas = self.add_weight(name='betas',),initializer=Constant(
                                     value=self.init_betas),# initializer='ones',trainable=True)

    super(RBFLayer,self).build(input_shape)

def call(self,x):

    C = K.expand_dims(self.centers)
    H = K.transpose(C-K.transpose(x))
    return K.exp(-self.betas * K.sum(H**2,axis=1))

    # C = self.centers[np.newaxis,:,:]
    # X = x[:,np.newaxis,:]

    # diffnorm = K.sum((C-X)**2,axis=-1)
    # ret = K.exp( - self.betas * diffnorm)
    # return ret

def compute_output_shape(self,input_shape):
    return (input_shape[0],self.output_dim)

def get_config(self):
    # have to define get_config to be able to use model_from_json
    config = {
        'output_dim': self.output_dim
    }
    base_config = super(RBFLayer,self).get_config()
    return dict(list(base_config.items()) + list(config.items()))

创建RBF网络

   from keras import Sequential
   from keras import layers
   from keras.layers import *
   rbflayer = RBFLayer(136,initializer=InitCentersRandom(X),betas=2.0,input_shape=X.shape[1:])

   model = Sequential()
   #model.add(Flatten(input_shape=(28,28)))
   model.add(rbflayer)
   #model.add(Dense(1))
   model.add(layers.Dense(17,activation='softmax'))
   model.summary()

型号：“ sequential_8”

---

图层（类型）输出形状参数＃

rbf_layer_8（RBFLayer）（无，136）666536

---

dense_6（Dense）（None，17）2329

总参数：668,865 可训练的参数：668,865 不可训练的参数：0

import numpy as np
from keras.layers.core import Dense
from keras.optimizers import RMSprop
#from rbflayer import RBFLayer,InitCentersRandom
 import matplotlib.pyplot as plt

  from sklearn.metrics import mean_squared_error
  model.compile(loss='mean_squared_error',optimizer=RMSprop())
 print(X.shape)

  model.fit(X,y,batch_size=32,epochs=20,#steps_per_epoch=500,verbose=True
     )

我的输入和目标的形状是： X：（187，70，70） y：（187,17） 我有错误 InvalidArgumentError：不兼容的形状：[2240,17]与[32,17] 我该怎么处理

解决方法

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