I am trying to realize an Abel Inversion of some data. One way to do this is to create a spline-interpolation of the data, differentiate that spline-function and then use the following formula:
I(y) denotes the spline-function. I have tried to do this integral using fnint, but apparently it cannot cope with symbolic expressions, i.e. keeps complaining about the y- and r-symbols.
I would be very thankful for helpful hints.
Best Regards Chris