Am Montag, 25. Dezember 2017 15:58:26 UTC+1 schrieb Chris Angelico: > On Tue, Dec 26, 2017 at 1:48 AM, Nico Vogeli <nicco.9...@gmail.com> wrote: > > Am Montag, 25. Dezember 2017 14:51:21 UTC+1 schrieb Chris Angelico: > >> On Tue, Dec 26, 2017 at 12:36 AM, Nico Vogeli <nicco.9...@gmail.com> wrote: > >> > Hi everybody. First ad foremost, happy Christmas! > >> > >> Same to you! > >> > >> > I want to let the use input a function (like x**2) and parse it after > >> > that through code (for my numeric class) > >> > > >> > def newton(x0, s, s2, tol, n = 20000): > >> > ''' > >> > Näherung zur lösung einer Gleichung mit dem Newton-Verfahren > >> > x0 = Startwert > >> > f = zu lösende Funktion > >> > fx = Ableitung der Funktion > >> > > >> > ''' > >> > def f(a): > >> > y = s > >> > return y > >> > > >> > def fx(a): > >> > y = s2 > >> > return y > >> > >> > >> > newton(2, 3*x**2, 6*x, 0.1, 2) > >> > > >> > I notice that the x is not converted to an integer, because of the x = > >> > symplos('x') > >> > But I don't know how I could possibli change the code to work... > >> > >> The easiest way is to pass a *function* to newton(). It'd look like this: > >> > >> def newton(x0, f, fx, tol, n=20000): > >> ... as before, but without the nested functions > >> > >> newton(2, lambda x: 3*x**2, lambda x: 6*x, 0.1, 2) > >> > >> At least, I think that's how you're doing things. Inside the nested > >> functions, you use 'a', but outside, you use 'x'. Are those > >> representing the same concept? If so, the lambda functions given here > >> will have the same effect. > >> > >> Hope that helps! > >> > >> ChrisA > > > > Hi Chris > > > > Thanks very much for your quick response! > > I was in a bit of a rush, so I confused the variables (don't worry, I just > > messed arround to try different things, the original code was al tidy with > > the variable). > > > > I tried your input, but now I get another error: > > > > > > File "C:/Users/Nicco ZHAW/Desktop/Test GUI/Test Projekt.py", line 42, in > > newton > > b = x - f(x)/fx(x) > > > > TypeError: unsupported operand type(s) for /: 'function' and 'function' > > > > This did not occure befor I tried to implement the user input.. > > Did you remove the nested functions? The lambda functions completely > replace your "def f(a)" and "def fx(a)" functions. > > ChrisA
I am so so sorry!! I just did not know what you meant by sested functions.. :P Thank you so much for helping me! You're great! Cheers and all the best! Nicco -- https://mail.python.org/mailman/listinfo/python-list