MATLAB: 5 point differentation in Matlab

Question

Hi,

Can anyone please guide me as to how to perform 5 point differentiation n Matlab, what does 5 point differentiation mean?

Thanks

Answer 1

Here are a couple links that explain it about as clearly as possible:

Numerical differentiation formulas (Gives an example using a 4-point first derivative)

and:

Numerical differentiation

Note that if f(x) is the function you are differentiating (here the numerical data you have), h is the step size, that is:

h = x(k + 1) - x(k);

I have experimented with the algorithm for the 5-point first derivative. It is easy to implement, accurate, and reasonably precise.