How can I use fminsearch() to apply a sinc function (sin(x)/x) fit on my data?

I am aware that fminsearch can be used to achieve this, but it is not intuitive to me how it can be done. Can someone provide an example? T

[Torsten]

There is no parameter to be fitted within the sinc function...

Answer 1

[Sam Chak]

@Asser Abdelgawad

How about considering the nonlinear least-squares curve fitting lsqnonlin?

fun = @(p) p(1)*sinc(p(2)*(xdata - p(3))) - ydata;
p0  = [p1, p2, p3];
p   = lsqnonlin(fun, p0)
plot(xdata, ydata, 'r-', xdata, p(1)*sinc(p(2)*(xdata - p(3))), 'b-')