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statfct.h

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00001 /*
00002 
00003 Copyright (c) 2003, Cornell University
00004 All rights reserved.
00005 
00006 Redistribution and use in source and binary forms, with or without
00007 modification, are permitted provided that the following conditions are met:
00008 
00009    - Redistributions of source code must retain the above copyright notice,
00010        this list of conditions and the following disclaimer.
00011    - Redistributions in binary form must reproduce the above copyright
00012        notice, this list of conditions and the following disclaimer in the
00013        documentation and/or other materials provided with the distribution.
00014    - Neither the name of Cornell University nor the names of its
00015        contributors may be used to endorse or promote products derived from
00016        this software without specific prior written permission.
00017 
00018 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00019 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00020 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00021 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00022 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00023 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00024 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00025 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00026 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00027 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
00028 THE POSSIBILITY OF SUCH DAMAGE.
00029 
00030 */
00031 
00032 #if !defined _STATFCT_H
00033 #define _STATFCT_H
00034 
00035 extern "C"
00036 {
00037     /* if mode & 1 then return the complement of the cdf.
00038        if mode & 2 then return the natural logarithm
00039     */
00040 
00041     /** return the cdf of Gamma(alpha,gamma) at point x*gamma */
00042     double incomplete_gamma(double alpha, double x, int mode);
00043     
00044     /** return cdf of chi_square with n degrees of freedom at point chi2*/
00045     double chi_square(double chi2, double n, int mode);
00046     
00047     /** return the cdf of Beta(alpha,beta) at point x */
00048     double incomplete_beta(double x, double alpha, double beta, int mode);
00049     
00050     /** return cdf of Stunent with n degrees of freedom at t*/
00051     double student(double t, double n, int mode);
00052     
00053     /** return cdf of F-distribution(n,m) at F */
00054     double F(double F, double n, double m, int mode);
00055 }
00056 
00057 #endif // _STATFCT_H

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