How to find gradient of multiple variables at a given point?
I need to find gradient of function (x**2+y) at point [2, 4].
import numdifftools as nd
import sympy as sym
from sympy import *
x, y = sym.symbols('x y')
def rosen(x, y):
return (x**2 + y)
grad = nd.Gradient(rosen)([2, 4])
print("Gradient of is ", grad)
TypeError: rosen() missing 1 required positional argument: 'y'
Solution 1:
Argument to function passed to nd.Gradient must be an array.
import numdifftools as nd
def rosen(xy):
return (xy[0]**2 + xy[1])
grad = nd.Gradient(rosen)([2, 4])
print("Gradient of is ", grad)