zeros of Bessel functions

Has anyone posted an m-file which computes the zeros of bessel functions, J_n and Y_n?

Answer 1

[Steven Lord]

Why not just use FZERO?

 zroot = fzero(@(z) besselj(1, z), 3)
 besselj(1, zroot) % Should be small

[Pierrick HAMEL]

I added a guess for the ith zero of the bessel function of order n

for n =0:5

for i=1:6

guess = 2.5505 + 1.2474*n + (i-1)*pi;

Liste_zeros_Bessel(i,n+1) = fzero(@(z) besselj(n, z),guess);

end

end

Answer 2

[Mostafa Nakhaei]

The above answer only calculates one zero. However, in most cases, more than one zero is needed.

There are several m.file for finding the zeros of bessel function that U include in here:

https://www.mathworks.com/matlabcentral/fileexchange/48403-bessel-zero-solver

https://www.mathworks.com/matlabcentral/fileexchange/6794-bessel-function-zeros

Thanks

Mostafa

[Chris]

Quite useful. Thank you!