btdtr.c
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1 
2 /* btdtr.c
3  *
4  * Beta distribution
5  *
6  *
7  *
8  * SYNOPSIS:
9  *
10  * double a, b, x, y, btdtr();
11  *
12  * y = btdtr( a, b, x );
13  *
14  *
15  *
16  * DESCRIPTION:
17  *
18  * Returns the area from zero to x under the beta density
19  * function:
20  *
21  *
22  * x
23  * - -
24  * | (a+b) | | a-1 b-1
25  * P(x) = ---------- | t (1-t) dt
26  * - - | |
27  * | (a) | (b) -
28  * 0
29  *
30  *
31  * This function is identical to the incomplete beta
32  * integral function incbet(a, b, x).
33  *
34  * The complemented function is
35  *
36  * 1 - P(1-x) = incbet( b, a, x );
37  *
38  *
39  * ACCURACY:
40  *
41  * See incbet.c.
42  *
43  */
44 
45 /* btdtr() */
46 
47 
48 /*
49  * Cephes Math Library Release 2.0: April, 1987
50  * Copyright 1984, 1987, 1995 by Stephen L. Moshier
51  */
52 
53 #include "mconf.h"
54 
55 double btdtr(double a, double b, double x)
56 {
57 
58  return (incbet(a, b, x));
59 }
b
Scalar * b
Definition: benchVecAdd.cpp:17
x
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Definition: gnuplot_common_settings.hh:12
incbet
double incbet(double aa, double bb, double xx)
Definition: incbet.c:283
a
ArrayXXi a
Definition: Array_initializer_list_23_cxx11.cpp:1
mconf.h
btdtr
double btdtr(double a, double b, double x)
Definition: btdtr.c:55


gtsam
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autogenerated on Sat Nov 16 2024 04:01:56