Another feature request for predict

[sdemyanov]

Hi Anders,

Could you also add an option to view the probabilities in 'predict'?
I tried to do it by myself:

1. In class SoftmaxCrossEntropy I changed the function 'fprop' on
   def fprop(self, x):
   sm = self._softmax(x)
   return ca.nnet.one_hot_decode(sm), sm

2. in class NeuralNetwork I change the function 'predict' to return both predictions and probabilities

3. in 'test_error()' I read two values:
   y, yp = net.predict(test_input)

However, I always get an error 'too many values to unpack' for the 'test_error" function, which means that I do not reload it properly. Could you also explain how to do it correctly? Surprisingly I find two sources: in deeppy/deeppy and deeppy/build/lib/deeppy. Moreover, the upstack error appears in '/anaconda/lib/python2.7/site-packages/deeppy-0.1.dev0-py2.7.egg/deeppy/train/sgd.py', in the function 'val_error = val_error_fun()'. Could you clarify these details please?

Regards,
Sergey.

[andersbll]

Hi Sergey!

Just return the probabilities:

def fprop(self, x):
    return self._softmax(x)

I think you should also change the behavior of y_shape() to match the new array size. You can always get the class labels with numpy.argmax(). :)

I should say that I plan on changing the NeuralNetwork interface for more flexibility at test time.

Best,
Anders