CODEWITHSUNDEEP
pythonnumpy
Prashant Gupta
Prashant Gupta

Reputation: 163

Writing functional expression using numpy

I am trying to write a function using numpy, so that I can take its derivative.enter image description here

I was trying something like this, but was not able to get it working

x = Symbol('x')
y = (np.e ** (x ** 2)) * np.sin(x - np.pi)

y.diff(x)

I get the following error on this

'Add' object has no attribute 'sin'

Upvotes: 0

Views: 120

Answers (1)

Nils Werner
Nils Werner

Reputation: 36775

You should use the functions from sympy, not from numpy:

import sympy

x = sympy.Symbol('x')
y = (sympy.exp(x ** 2)) * sympy.sin(x - sympy.pi)
sympy.pprint(sympy.diff(y))

yields

       ⎛ 2⎞           ⎛ 2⎞       
       ⎝x ⎠           ⎝x ⎠       
- 2⋅x⋅ℯ    ⋅sin(x) - ℯ    ⋅cos(x)

Upvotes: 2

Related Questions