MATLAB: Substitute an array of number for a symbolic variable

Question

Hi,

I have:

syms x y
f=x^3+y^3+3x^2+2y^2+9
fx=diff(f,x)

now, I'd like to substitute these two vectors of x and y values into the expression fx.

x=[1,2,3,4,5]
y=[6,7,8,9,10]

How do I do that with the subs command? If I can't do that with the subs command, what do you recommend?

David.

Answer 1

subs(fx, {x, y}, {[1,2,4,5,6}, [6,7,8,9,10]})

This syntax is documented relatively far down in the examples.