Function logloss

Logistic-Regression/citreo.py:40–42

(p, y)

# OUTPUT
#     logarithmic loss of p given y
def logloss(p, y):
    p = max(min(p, 1. - 10e-12), 10e-12)
    return -log(p) if y == 1. else -log(1. - p)


# B. Apply hash trick of the original csv row