Cross entropy

class QuadraticCost(object):

    @staticmethod
    def fn(a, y):
        return 0.5*np.linalg.norm(a-y)**2

    @staticmethod
    def delta(z, a, y):
        return (a-y) * sigmoid_prime(z)

Source: neuralnetworksanddeeplearning.com

Similar codes

0 vote234 views1 answer
Conditional Statements to Skip Items
Python
1 vote157 views1 answer
Python multiplication array
Python
3 votes149 views1 answer
Creating a virtual environment in python 3.8
Python
15 votes151 views2 answers
Df to excel
Python
1 vote161 views1 answer
Django manger
Python
0 vote197 views1 answer
ValueError: columns overlap but no suffix specified:
Python
0 vote144 views1 answer
Which clause is used to place condition with GROUP BY clause in a table
Python
0 vote165 views2 answers
Python min value index from an array
Python
2 votes161 views2 answers
Calculate mean on python
Python
0 vote144 views1 answer
Convert sentence to words python
Python