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#ifndef __STATISTIC_GENERATE_P_VALUE_H__
#define __STATISTIC_GENERATE_P_VALUE_H__
/*LICENSE_START*/
/*
* Copyright 1995-2002 Washington University School of Medicine
*
* http://brainmap.wustl.edu
*
* This file is part of CARET.
*
* CARET is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* CARET is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with CARET; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/*LICENSE_END*/
#include "StatisticAlgorithm.h"
/// generate P-Values from a statistic and degrees-of-freedom
class StatisticGeneratePValue : public StatisticAlgorithm {
public:
// generate P-Value for an F-Statistic
static float getFStatisticPValue(const float numeratorDegreesOfFreedom,
const float denominatorDegreesOfFreedom,
const float F);
// generate P-Value for One-Tailed T-Test
static float getOneTailTTestPValue(const float degreesOfFreedom,
const float T);
// generate P-Value for Two-Tailed T-Test
static float getTwoTailTTestPValue(const float degreesOfFreedom,
const float T);
/// type of statistic
enum INPUT_STATISTIC {
/// input statistic if F-Statistic
INPUT_STATISTIC_F,
/// input statistic is T-statistic with one tale distribution
INPUT_STATISTIC_T_ONE_TALE,
/// input statistic is T-statistic with two tale distribution
INPUT_STATISTIC_T_TWO_TALE
};
// constructor
StatisticGeneratePValue(const INPUT_STATISTIC inputStatisticTypeIn);
// destructor
~StatisticGeneratePValue();
// generate the P-Values
void execute() throw (StatisticException);
// get the output data group that contains the P-values
const StatisticDataGroup* getOutputDataGroupContainingPValues() const
{ return outputDataGroupContainingPValues; }
protected:
/// type of input statistic
INPUT_STATISTIC inputStatisticType;
// from AFNI and used by tStatisticToPValue
static double incbeta( double x , double p , double q , double beta );
// from AFNI and used by tStatisticToPValue
static double lnbeta( double p , double q );
// from AFNI and used by tStatisticToPValue
static double gamma( double x );
// from AFNI and used by tStatisticToPValue
static double gamma_asympt(double x);
// from AFNI and used by tStatisticToPValue
static double gamma_12( double y );
// the output data group
StatisticDataGroup* outputDataGroupContainingPValues;
};
#endif // __STATISTIC_GENERATE_P_VALUE_H__
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