Thanks, David, I realized that and solved it. Thanks for the heads-up.
On Saturday, December 4, 2021 at 8:02:45 PM UTC+5:30 da...@dbailey.co.uk
wrote:
> On 03/12/2021 19:22, Swadhin Satapathy wrote:
>
> I got the following error:
>
> File "C:\Users\Admin\.spyder-py3\temp.py", line 22, in <module>
> a = newton(p, p_prime,-10, 0)
>
> File "C:\Users\Admin\.spyder-py3\temp.py", line 15, in newton
> delta = p(x)/p_prime(x)
>
> TypeError: 'Add' object is not callable
>
> While running the following code:
>
> import numpy as np
> import matplotlib.pyplot as plt
> import sympy as sym
> acc = 1E-10
>
> x = sym.Symbol('x')
> def p(x): #define the function
> return 924*x**6 - 2772*x**5 + 3150*x**4 - 1680*x**3 + 420*x**2 - 42*x
> + 1
>
> p_prime = sym.diff(p(x))
> print(p_prime)
>
> def newton(p,p_prime, acc, start_val):
> x= start_val
> delta = p(x)/p_prime(x)
> while abs(delta) > acc:
> delta = p(x)/p_prime(x)
> print(abs(delta))
> x =x- delta;
> return round(x, acc);
>
> a = newton(p, p_prime,-10, 0)
>
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> .
>
> Try adding this line immediately before your line 15:
>
> print("p=",p," p_prime=",p_prime)
>
> If you do that, you will see that p is a function - so it is OK to call it
> as in p(x),
>
> however p_prime is an expression (an Add object, since it consists of a
> number of terms added/subtracted together), so it isn't OK to call it as in
> p_prime(x).
>
> Hence your error message!
> TypeError: 'Add' object is not callable
>
> That error message is super obscure, it would be good to see it upgraded.
>
> Cheers,
>
> David
>
>
>
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