danieljoserodriguez

# Daniel J. Rodriguez
# https://github.com/danieljoserodriguez
import numpy as np


# Cross-entropy loss, or log loss, measures the performance of a classification model whose output is a 
# probability value between 0 and 1
def cross_entropy(y_hat, y):
    return -np.log(y_hat) if y == 1 else -np.log(1 - y_hat)

danieljoserodriguez

# Daniel J. Rodriguez
# https://github.com/danieljoserodriguez

import numpy as np


# A straight line function where activation is proportional to input
# ( which is the weighted sum from neuron ).

# In mathematics, an identity function, also called an identity relation or