src
CommonTools
Statistics
src
GammaLn.cc
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1
#include "
CommonTools/Statistics/src/GammaLn.h
"
2
#include <cmath>
3
4
float
GammaLn
(
float
z
) {
5
const
static
double
coefficients[6] = {76.18009172947146,
6
-86.50532032941677,
7
24.01409824083091,
8
-1.231739572450155,
9
0.1208650973866179e-2,
10
-0.5395239384953e-5};
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12
double
temp
=
z
+ 5.5;
13
temp
-= (
z
+ 0.5) *
log
(
temp
);
14
double
y
=
z
;
15
double
series = 1.000000000190015;
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for
(
int
term = 0; term < 6; term++)
17
series += coefficients[term] / ++
y
;
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return
-
temp
+
log
(2.5066282746310005 * series /
z
);
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}
CrabHelper.log
log
Definition:
CrabHelper.py:12
groupFilesInBlocks.temp
list temp
Definition:
groupFilesInBlocks.py:142
GammaLn.h
ctppsOpticalFunctions_non_DB_cff.z
z
Definition:
ctppsOpticalFunctions_non_DB_cff.py:15
GammaLn
float GammaLn(float z)
Definition:
GammaLn.cc:4
relval_data_highstats.y
y
Definition:
relval_data_highstats.py:28
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