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

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ToLos Mil on 23 Nov 2013

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Commented: Walter Roberson on 23 Nov 2013

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?

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Walter Roberson on 23 Nov 2013

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

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ToLos Mil on 23 Nov 2013

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

Walter Roberson on 23 Nov 2013

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

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