/* btdtr.c * * Beta distribution * * * * SYNOPSIS : * * double a , b , x , y , btdtr ( ) ; * * y = btdtr ( a , b , x ) ; * * * * DESCRIPTION : * * Returns the area from zero to x under the beta density * function : * * * x * - - * | ( a + b ) | | a - 1 b - 1 * P ( x ) = - - - - - - - - - - | t ( 1 - t ) dt * - - | | * | ( a ) | ( b ) - * 0 * * * This function is identical to the incomplete beta * integral function incbet ( a , b , x ) . * * The complemented function is * * 1 - P ( 1 - x ) = incbet ( b , a , x ) ; * * * ACCURACY : * * See incbet . c . * /* btdtr() */ /*Cephes Math Library Release 2 . 8 : June , 2000 Copyright 1984 , 1987 , 1995 , 2000 by Stephen L . Moshier #include "mconf.h" #ifdef ANSIPROTextern double incbet ( double , double , double );#else double incbet();#endif double btdtr( a, b, x )double a, b, x;return ( incbet( a, b, x ) );
Messung V0.5 in Prozent C=96 H=100 G=97
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