gistfile1.py

def GD(f,Df,x0,alpha, epsilon, max_iter,):

    xn = x0
    for n in range(0,max_iter):
        fxn = f(xn)
        Dfxn = Df(xn)
        if Dfxn == 0:
            print('Turunan Nol. Stop.')
            return None
        xn = xn - alpha*Dfxn
        print(n+1," ", xn)
    print('Melebihi Maks Iterasi.')
    return None


def newton(f,Df,x0,epsilon,max_iter):
    '''Approximate solution of f(x)=0 by Newton's method.'''


    xn = x0
    for n in range(0,max_iter):
        fxn = f(xn)
        if abs(fxn) < epsilon:
            print('Solusi didapat setelah',n,'iterasi.')
            return xn
        Dfxn = Df(xn)
        if Dfxn == 0:
            print('Turunan Nol. Stop.')
            return None
        xn = xn - fxn/Dfxn
        print(xn)
    print('Melebihi Maks Iterasi.')
    return None


x0 = 5
eror = 1e-10
iterasi = 100
approx = GD(p,Dp,5,eror,iterasi)
print(approx)