Increase calculation precision by exceeding realmax value - Problem with large inputs to besseli function

Hello to all,

I am trying to do some calculations with bessel function besseli . The problem that I am facing is that the calculations return Inf values for large inputs such as 2.01e+03 + 2.01e+03i.

The same calculation result in Mathematica is 3.39e+870-5.42e+870i.

Is there a way to change the realmax value and allow this type of calculations in Matlab?

Answer 1

[Walter Roberson]

No. You will need to use the Symbolic Toolbox or equivalent, or find a way to rewrite it.

[ToLos Mil]

Could you please provide an example of how the Symbolic Toolbox could be used to that purpose?

[Walter Roberson]

See http://www.mathworks.com/help/symbolic/besselj.html for some examples.

You might also want to increase the precision as well as the range; see http://www.mathworks.com/help/symbolic/digits.html