Displaying 5 results from an estimated 5 matches for "lgammafn".
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2000 Nov 28
1
non-centrality parameter in pf() (PR#752)
Bug Description:
Problem with the function pf() when the non-centrality
parameter is large. Here is a sample command. You should
see a smooth line from 0 to about 55, and then the values
of pf() go crazy from 55 to 100.
############################
ncp <- seq(0,100,length=200)
plot(ncp,pf(5,7,2,ncp=ncp))
############################
Version:
platform = i686-pc-linux-gnu
arch = i686
os =
2003 Jul 16
2
Density function for non-central t distribution
...tails.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
*
* NOTE
*
* Requires the following auxiliary routines:
*
* lgammafn(x) - log gamma function
* pnt(x, df, ncp) - the distribution function for the non-central t distribution
*
*
* DESCRIPTION
*
* The non-central t density is
*
* f(x, df, ncp) =
df^(df/2)*exp(-.5*ncp^2)/(sqrt(pi)*gamma(df/2)*(df+x^2)^((df+1)/2))*sum_{k=0}^Infinity gamma(...
2009 Jan 05
1
transform R to C
Dear R users,
i would like to transform the following function from R-code to C-code and call it from R in order to speed up the computation because in my other functions this function is called many times.
`dgcpois` <- function(z, lambda1, lambda2)
{
`f1` <- function(alpha, lambda1, lambda2)
return(exp(log(lambda1) * (alpha - 1) - lambda2 * lgamma(alpha)))
`f2` <-
2004 Oct 22
3
pgamma discontinuity (PR#7307)
Full_Name: Morten Welinder
Version: 2
OS: Solaris/space/gcc2.95.2
Submission from: (NULL) (65.213.85.217)
I changed src/nmath/standalone/test.c to read:
---------------------------------------------------------------------------------
#define MATHLIB_STANDALONE 1
#include <Rmath.h>
#include <stdio.h>
int
main()
{
double x;
for (x = 99990; x <= 100009; x++)
printf
1999 Aug 03
2
compliation problem
Problem compiling R.
version: 0.64.2
machine: SGI O2
OS: IRIX6.5
CC cc
FC f77
MAKE GNU make 3.75
Here is part of the the output for make.
make[2]: Leaving directory `/usr/people/faculty/math/mgass/stage/R/R-0.64.2/src/include'
make[2]: Entering directory `/usr/people/faculty/math/mgass/stage/R/R-0.64.2/src/appl'
cc -g -OPT:IEEE_NaN_inf=ON -I../include