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

1 vote308 views1 answer
Django.db.models avg
Python
2 votes320 views1 answer
Average out all rows pandas
Python
0 vote344 views1 answer
Mount gdrive in pyton
Python
0 vote415 views1 answer
Check if key exists in sesson python flask
Python Flask
1 vote354 views4 answers
Numpy count occurrences in array
Python
2 votes345 views2 answers
Tkinter button foreground color click
Python
0 vote445 views1 answer
Get a list of ids from queryset django
Python Django
0 vote346 views1 answer
Preserve leading zeros python
Python
3 votes396 views1 answer
Clean punctuation from string python
Python
3 votes330 views2 answers
How to make python code faster
Python