Accuracy of the Modified Bessel Functions

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Joshua 2013-10-3

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https://ww2.mathworks.cn/matlabcentral/answers/89117-accuracy-of-the-modified-bessel-functions

回答： Neethu 2013-12-22

I will be using the modified bessel functions I and K ( besseli and besselk in the matlab code) and I am concerned about the accuracy of the functions. I plan to use the special case in which

nu = 0.

Calculating the bessel functions for this special case requires a different formula, and I am curious if the matlab function is still accurate.

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Answer 1

Neethu 2013-12-22

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https://ww2.mathworks.cn/matlabcentral/answers/89117-accuracy-of-the-modified-bessel-functions#answer_119083

Can you please tell what is that formula? Actually i need to calculate modified zeroth order bessel function of first kind.It returns infinity values after 700.Can we write our own code for this function instead of built in besseli()