#bug 1: besselI() for nu<0 and expon.scaled=TRUE #tested with R-devel (2007-06-17 r41981) x <- 2.3 nu <- -0.4 print(paste(besselI(x, nu, TRUE), "=", exp(-x)*besselI(x, nu, FALSE))) #fix: #$ diff bessel_i_old.c bessel_i_new.c #57c57 #< bessel_k(x, -alpha, expo) * ((ize == 1)? 2. : 2.*exp(-x))/M_PI #--- #> bessel_k(x, -alpha, expo) * ((ize == 1)? 2. : 2.*exp(-2.0*x))/M_PI
#bug 2: besselY() for nu<0 #don't know how to check in R; a few random checks against mathematica 5.2 #fix: #$ diff bessel_y_old.c bessel_y_new.c #55c55 #< return(bessel_y(x, -alpha) + bessel_j(x, -alpha) * sin(-M_PI * alpha)); #--- #> return(bessel_y(x, -alpha) * cos(M_PI * alpha) - bessel_j(x, -alpha) * sin(M_PI * alpha)); h. -- ---------------------------------- Hiroyuki Kawakatsu Business School Dublin City University Dublin 9, Ireland Tel +353 (0)1 700 7496 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
