In [12]:

    

J = 0
dw1 = 0
dw2 = 0
db = 0

for i in range(m):
    z[i] = w.T*x + b
    a[i] = o(z[i])
    J += -( y[i] * log(a(i)) + (1-y[i]) * log(1-a(i)) )
    dz[i] = a[i] - y[i]
    dw1 += x[i,1] * dz[i]
    dw2 += x[i,2] * dz[i]
    db += dz[i]   
J /= m
dw1 /= m
dw2 /= m
db /= m

# Ajustando pelo gradiente
w1 = w1 - alpha*dw1
w2 = w2 - alpha*dw2
b = b - alpha*db


    

    




  File "<ipython-input-12-34e3f4c588bb>", line 7
    z[i] = w[]
             ^
SyntaxError: invalid syntax