| components.conf |
|
551 |
| moz.build |
|
398 |
| nsBayesianFilter.cpp |
|
89257 |
| nsBayesianFilter.h |
Helper class to enumerate Token objects in a PLDHashTable
safely and without copying (see bugzilla #174859). The
enumeration is safe to use until an Add()
or Remove() is performed on the table.
|
13793 |
| nsIncompleteGamma.h |
An implementation of the incomplete gamma functions for real
arguments. P is defined as
x
/
1 [ a - 1 - t
P(a, x) = -------- I t e dt
Gamma(a) ]
/
0
and
infinity
/
1 [ a - 1 - t
Q(a, x) = -------- I t e dt
Gamma(a) ]
/
x
so that P(a,x) + Q(a,x) = 1.
Both a series expansion and a continued fraction exist. This
implementation uses the more efficient method based on the arguments.
Either case involves calculating a multiplicative term:
e^(-x)*x^a/Gamma(a).
Here we calculate the log of this term. Most math libraries have a
"lgamma" function but it is not re-entrant. Some libraries have a
"lgamma_r" which is re-entrant. Use it if possible. I have included a
simple replacement but it is certainly not as accurate.
Relative errors are almost always < 1e-10 and usually < 1e-14. Very
small and very large arguments cause trouble.
The region where a < 0.5 and x < 0.5 has poor error properties and is
not too stable. Get a better routine if you need results in this
region.
The error argument will be set negative if there is a domain error or
positive for an internal calculation error, currently lack of
convergence. A value is always returned, though.
|
7334 |
| test |
|
|