这里有很多目标函数.
但是你如何创建自己的目标函数,我试图创建一个非常基本的目标函数,但它给出了一个错误,我无法知道在运行时传递给函数的参数的大小.
def loss(y_true,y_pred):
loss = T.vector('float64')
for i in range(1):
flag = True
for j in range(y_true.ndim):
if(y_true[i][j] == y_pred[i][j]):
flag = False
if(flag):
loss = loss + 1.0
loss /= y_true.shape[0]
print loss.type
print y_true.shape[0]
return loss
我有两个矛盾的错误,
model.compile(loss=loss, optimizer=ada)
File "/usr/local/lib/python2.7/dist-packages/Keras-0.0.1-py2.7.egg/keras/models.py", line 75, in compile
updates = self.optimizer.get_updates(self.params, self.regularizers, self.constraints, train_loss)
File "/usr/local/lib/python2.7/dist-packages/Keras-0.0.1-py2.7.egg/keras/optimizers.py", line 113, in get_updates
grads = self.get_gradients(cost, params, regularizers)
File "/usr/local/lib/python2.7/dist-packages/Keras-0.0.1-py2.7.egg/keras/optimizers.py", line 23, in get_gradients
grads = T.grad(cost, params)
File "/usr/local/lib/python2.7/dist-packages/theano/gradient.py", line 432, …