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CommonTools
Statistics
src
GammaLn.cc
Go to the documentation of this file.
1
#include "
CommonTools/Statistics/src/GammaLn.h
"
2
#include <cmath>
3
4
float
5
GammaLn
(
float
z
)
6
{
7
const
static
double
coefficients[6] =
8
{ 76.18009172947146, -86.50532032941677, 24.01409824083091,
9
-1.231739572450155, 0.1208650973866179e-2, -0.5395239384953e-5 };
10
11
double
temp
= z+5.5;
12
temp -= (z+0.5)*
log
(temp);
13
double
y
=
z
;
14
double
series = 1.000000000190015;
15
for
(
int
term = 0; term < 6; term++ )
16
series += coefficients[term]/++y;
17
return
-temp +
log
(2.5066282746310005*series/z);
18
}
groupFilesInBlocks.temp
temp
Definition:
groupFilesInBlocks.py:140
detailsBasic3DVector::z
float float float z
Definition:
extBasic3DVector.h:15
GammaLn.h
GammaLn
float GammaLn(float z)
Definition:
GammaLn.cc:5
detailsBasic3DVector::y
float float y
Definition:
extBasic3DVector.h:15
cmsBatch.log
log
Definition:
cmsBatch.py:341
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