| s18gk {NAGFWrappers} | R Documentation |
s18gk returns a sequence of values for the Bessel functions J_α + n - 1(z) or J_α - n + 1(z) for complex z, non-negative α < 1 and n = 1 , 2 , . . . , abs(N) + 1.
s18gk(z, a, nl)
z |
complex The argument z of the function. |
a |
double The order α of the first member in the required sequence of function values. |
nl |
integer The value of N. |
R interface to the NAG Fortran routine S18GKF.
B |
complex array With ifail =0, ifail =3, the required sequence of function values: b[n] contains J_α + n - 1(z) if nl >= 0 and J_α - n + 1(z) otherwise for n=1 . . . abs(nl)+1. |
IFAIL |
integer ifail =0unless the function detects an error or a warning has been flagged (see the Errors section in Fortran library documentation). |
NAG
http://www.nag.co.uk/numeric/FL/nagdoc_fl23/pdf/S/s18gkf.pdf
ifail<-0 z<-complex(1,0.6,-0.8) a<-0 nl<-3 s18gk(z,a,nl)