How can I find the centroid of a curve for peak detection?

The equation that I am trying to fit for the centroid is

λ_B "=" (Σ_(i=1)^N λ_i A_i)/(Σ_(i=1)^N A_i )

I am trying to find an appropriate method to fit this equation in a plot.

Answer 1

[Abhisek Pradhan]

Here is a link which has a detailed documentation and example on curve fitting.

https://in.mathworks.com/help/curvefit/curve-fitting.html