bessel(0,3) instead of a function that writes a numeric value?

Bessel functions solution of differential equations in MATLAB equation, as a result of we have, on the command line and result bessel(0,3) to write the expression as. Instead, I'm looking for a function that specifies the exact numeric value. Please could you help.

[Torsten]

Not clear what you mean.

If you write

a = bessel(0,3);

a has the exact numerical value of bessel(0,3).

Best wishes

Torsten.

Answer 1

[Walter Roberson]

BesselJ(0,3) is an infinite series that does not have a simple representation, so you will not be able to obtain an exact value for it.

[Zafer EVRAN]

This returns the photo I uploaded(2, 2) The result with the value I want to give the value of 0.3528. I'm looking for a function that gives him. Thank you.

[Zafer EVRAN]

[Steven Lord]

I don't understand what you're asking for.

• Do you have the value J = 0.3528 and you're looking for the nu and z inputs to BESSELJ that will give you that result?
• Do you have the nu and z values nu = 2, z = 2 and want to find the value of the Bessel J function for those parameters?
• Do you have some other combination of values (say nu and J and you want to find z?)
• Do you have some other problem entirely?

The first case is going to be a little difficult; I would probably choose a value for nu and then use FZERO to find a root of @(z) J-besselj(nu, z). If it can't find such a root for the arbitrarily selected nu, choose a different nu and repeat the process.

The second case is just a straightforward call to BESSELJ.

The third case requires a slight modification of the first case.

The fourth case is going to require more explanation from you about the problem you're trying to solve.