Cálculo da Acurácia

accuracy.py

def classifications(theta_1, theta_2, X,):
  a1 = np.append(np.ones(shape=(X.shape[0], 1)), X, axis=1)

  z2 = a1 @ theta_1.transpose()
  a2 = sigmoid(z2)
  a2 = np.append(np.ones(shape=(a2.shape[0], 1)), a2, axis=1)

  z3 = a2 @ theta_2.transpose()
  a3 = sigmoid(z3)
  
  classifs = np.argmax(a3, axis=1)
  return classifs

def accuracy(theta_1, theta_2, X, y, y_classif):
  classifs = classifications(theta_1, theta_2, X)
  acertos = np.sum(classifs == y_classif)
  total = classifs.size
  return acertos / total