search for: bessel

Dear all Currently, I'm implementing the generalized hyperbolic distribution into Splus. Unfortunately the Bessel function is not implemented in Splus. In R the Bessel function does exist but it is an internal function and I'm not able to look at the code. Is there any possibility to see the code of the Bessel function in R or does anybody has an implementation of the Bessel function in Splus? Thanks a l...

In order to fit a probability distribution proposed by Sichel [Journal of the Royal Statistical Society. Series A (General), Vol. 137, No. 1. (1974), pp. 25-34], I need a modified Bessel function of the 2nd kind. I notice that the base package of "R" only has modified Bessel functions of the 1st and 3rd kind. Does a modified Bessel function of the 2nd kind exist anywhere? Many thanks, Andrew Wilson

I am not yet a R user but I will be soon. I am looking for the R command and syntax to compute the roots of Bessel function i.e. computing the z values that lead to Jnu(z)=0 where J is a Bessel function or order nu. May You help me ? thanks in advance. Dr Catherine COUTAND Institut National de la Recherche Agronomique (INRA) umr Physiologie Int?grative de l'Arbre Fruitier et Forestier (PIAF) 234 av. du B...

I am looking for a method of dealing with the modified Bessel function K_\nu(x) for large \nu. The besselK function implementation of this allows for dealing with large values of x by allowing for exponential scaling, but there is no facility for dealing with large \nu. What would work for me would be an lbesselK function in the manner of lgamma which r...

Debian tries to build its packages on a variety of platforms. The arm platform compiled 0.90.1 (the last Debian release before the Debian package required an Atlas library, something we no longer require) failed in 'make check'. The log snippet follows; I traced this to the example(Bessel) code. > matplot(nu, t(outer(xx,nu, besselI)), type = 'l', ylim = c(-50,200), + main = expression(paste("Bessel ",I[nu](x)," for fixed ", x, + ", as ",f(nu))), + xlab = expression(nu)) Error in title(main =...

Hello, I am searching for code in C++ or fortran for Modified Bessel function of third kind (fractional or real order). Can someone help me? Thank you --------------------------------- Découvrez un nouveau moyen de poser toutes vos questions quelque soit le sujet ! Yahoo! Questions/Réponses pour partager vos connaissances, vos opinions et vos exp...

Dear list, Could someone enlighten me a bit on the exact format used for text help pages as I see them on Windows in the help/ folders of (compiled) package roots. When opening an example of these files in a text editor (?Bessel in GNU emacs), the file is displayed as follows: _^HB_^He_^Hs_^Hs_^He_^Hl_^H _^HF_^Hu_^Hn_^Hc_^Ht_^Hi_^Ho_^Hn_^Hs Bessel package:base R Documentation _^HB_^He_^Hs_^Hs_^He_^Hl_^H _^HF_^Hu_^Hn_^Hc_^Ht_^Hi_^Ho_^Hn_^Hs _^HD_^He_^Hs_^Hc_^Hr_^Hi_^Hp_^Ht_^Hi_^Ho_^Hn:...

Dear R users, I'm porting a piece of Matlab code to R, but I'm now stuck with the following: I need an equivalent of besselJ(x, nu) that can handle a complex argument x. I couldn't find any R implementation. I did find a possible fortran solution in SLATEC (< http://www.netlib.org/slatec/ > , CBESJ-C), however I've never tried to use external C or Fortran code together with my R code, so I'm no...

Dear R users, I'm porting a piece of Matlab code to R, but I'm now stuck with the following: I need an equivalent of besselJ(x, nu) that can handle a complex argument x. I couldn't find any R implementation. I did find a possible fortran solution in SLATEC (< http://www.netlib.org/slatec/ > , CBESJ-C), however I've never tried to use external C or Fortran code together with my R code, so I'm no...

Hi: There is a Modified Bessel function (third kind, real order) besselK in R. Is there a C version of this function? I can only find a Fortran function rkbesel on http://www.netlib.org/specfun/. However, this rkbesel fortran function is the second kind. Thank you! liu _______________________________ Declare Yourself -...

Dear all, I'm writing a code that requires Bessel functions with complex argument. Searching the list, I found the continuation of a thread I initiated a few months ago: http://tolstoy.newcastle.edu.au/R/e4/devel/08/03/0746.html As I understand, the most promising option would be to use the fortran or C implementation of Amos, http://portal.acm...

...**** Debian tries to build its packages on a variety of platforms. The arm platform compiled 0.90.1 (the last Debian release before the Debian package required an Atlas library, something we no longer require) failed in 'make check'. The log snippet follows; I traced this to the example(Bessel) code. > matplot(nu, t(outer(xx,nu, besselI)), type = 'l', ylim = c(-50,200), + main = expression(paste("Bessel ",I[nu](x)," for fixed ", x, + ", as ",f(nu))), + xlab = expression(nu)) Error in title(main = main, sub = sub, xlab = xlab, ylab = ylab,...

...R-0.99.0 to compile and pass the tests on a Debian Linux/Alpha 2.2 system by recompiling src/main/optim.c by hand omitting the -O2 flag. I just tried R-1.0.0 on a similarly configured machine, although not the same machine as before, and it compiled ok but failed the tests. This time it fails on bessel> x <- seq(0, 4, len = 501) bessel> plot(x, x, ylim = c(0, 6), ylab = "", type = "n", main = "Bessel Functions I_nu(x)") Error in axis(side, at, labels, ...) : no locations are finite Doing some checking by hand shows that plot(x, x) works and that...

#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...

...:12 > x + 1 [1] 0 1 2 3 4 5 6 7 8 9 10 11 12 13 > 2 * x + 3 [1] 1 3 5 7 9 11 13 15 17 19 21 23 25 27 > x %% 2 #-- is periodic [1] 1 0 1 0 1 0 1 0 1 0 1 0 1 0 > x %/% 5 [1] -1 0 0 0 0 0 1 1 1 1 1 2 2 2 > > > > cleanEx(); ..nameEx <- "Bessel" > > ### * Bessel > > ### Name: Bessel > ### Title: Bessel Functions > ### Aliases: bessel Bessel besselI besselJ besselK besselY gammaCody > ### Keywords: math > > ### ** Examples > > nus <- c(0:5,10,20) > > x <- seq(0,4, len= 501) > plot(x...

Assistance, besselK- complex number problem Im a student intrested in using R in my learning and research work in option pricing however i have a problem with besselK function In R. Would you assit me in computing the besselK of third kind of a complex number in R. Any code or suggestion will be highly appriceiat...

...Debian tries to build its packages on a variety of platforms. The arm platform compiled 0.90.1 (the last Debian release before the Debian package required an Atlas library, something we no longer require) failed in 'make check'. The log snippet follows; I traced this to the example(Bessel) code. > matplot(nu, t(outer(xx,nu, besselI)), type = 'l', ylim = c(-50,200), > + main = expression(paste("Bessel ",I[nu](x)," for fixed ", x, > + ", as ",f(nu))), > + xlab = expression(nu)) > Error in title(main = main, sub = sub, xlab...

Dear R-Group: Recently, I ran into a problem. I was using a function called "I.1", which evaluates the first-order modified Bessel function of the first kind, in the package "CircStats". This function is not vectorized, since it uses a couple of "if" conditions. However, when I called this function with a vector argument, I got no error/warning messages in R1.5.1 (under Windows 2000). Furthermore, the...

Hi R-users, Can Maple function be exported to R? I have a jacobian matrix (4X4)?from maple in algebraic form which involve modified Bessel function of the first kind. I just wonder whether we can use algebraic form into R before the value of the parameters can be estimated. Thank you so much for your attention and help.

...a/sbin/nmbd -D /libexec/ld-elf.so.1: Shared object "libtalloc.so.1" not found, required by "nmbd" I have done a default install, configure, make, make install with no parameters or switches. There clearly needs to be something else installed but I don't know what. Mr David Bessell Network Manager St Michael's Collegiate School Phone 03 6211 4940 Fax 03 6211 4955 218 Macquarie Street Hobart 7000 The Christ College Trust trading as ST MICHAEL'S COLLEGIATE SCHOOL CRICOS Registration No. 00482K The contents of this email are confidential. Any unauthor...