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Evaluates the first derivative of the Ratio of First and Zeroth Order Bessel Functions
A1FirstDerivative(kappa)
The value of the first derivative of A1 function in the point kappa.
kappa
non-negative numeric value at which to evaluate the first derivative of A1 function.
Claudio Agostinelli and Alessandro Gagliardi.
The formula (3.48) of Fisher (1993), pag. 52 is implemented. The function uses A1 and besselI.
A1
besselI
N.I. Fisher (1993) Statistical Analysis of Circular Data, Cambridge University Press.
A1, besselI, A1inv.
A1inv