How do I partial differentiation a function with 2 variables?

My function is P(V,R) = V^2/R.

I know how to find the partial differentiation of the function with respective to V or R.

However, how do I find the partial differentiation of P with the value V=120 and R=2000?

Because I know there is a formula to find the partial differentiation of P.

How do i put it in Matlab?

Answer 1

[VBBV]

Try this

 % if true
    % code
 % end
v = sym('120')
r = sym('2000')
p = diff(v^2/r)

Since you assign for V, R as constants, the pde will return as 0

[Kevin Lee]

so actually, i have dV = 0.02V and dR = 0.03R. i was trying to use the formula dP=(dP/dV)*dV + (dP/dR)*dR. Is there a way to code the formula into matlab?