How to find the gradient of a curve at a specific point?

Answer 1

[Jose Marques]

If the data is in the variable "data", you find the gradient like this:

grad = zeros(size(data))

for i=1:(size(data,2)-1)
    grad(i) = data(i+1)-data(i);
end

[Pramodya Wijesinghe]

Thank you very much!That was really helpful.