ramonrosa/lin_reg_funcao_custo.py

## lin_reg_funcao_custo.py
def funcao_custo(theta, X, y):
    m = len(y)

    y_pred = X.dot(theta).flatten()
    J = (1/m)*np.sum((y-y_pred)**2)
    gradiente = -(2/m)*((X.T).dot(y - y_pred)).flatten()

    return J, gradiente
	def funcao_custo(theta, X, y):
	m = len(y)

	y_pred = X.dot(theta).flatten()
	J = (1/m)np.sum((y-y_pred)*2)
	gradiente = -(2/m)*((X.T).dot(y - y_pred)).flatten()

	return J, gradiente