Hy can anyone can tell me how i can solve this equation 2xJ1(x) − J0(x) = 0 where J1 and J0 are the Bessel function in Matlab without using the fsolve command
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Are you asking about using numerical methods to solve it? – John Alexiou May 24 '11 at 23:32
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You can use fzero to find the zeros if and only if the curve crosses the x-axis. So
fzero(@(x)(2*x*besselj(1,x)-besselj(0,x)),x0)
will give you the zero close to x0.
See this answer of mine for an explanation of when and why fzero fails (although it won't for a Bessel function, it's good to be aware) and the tradeoffs with fsolve.
