Help with Numerical Differentiation

Hi there,

Nothing I try seems to work.

I am given data Time, ti (s): [0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50] and Displacement, yi (mm): [0.144 0.172 0.213 0.296 0.070 0.085 0.525 0.110 0.062 0.055].

Find dy/dt , d^2y/dt^2 and d^3y/dt^3 using finite difference formulae with a step size of Δt =0.05.

I dont know what function to use and how to solve this problem when given step size. Appreciate the help

Answer 1

[Uday Pradhan]

Hello Deepa,

Please check this example : Approximate derivates with diff function.

You can easily calculate the forward finite difference approximations of the derivatives by following this example. Hope this helps!