/usr/include/tjutils/tjnumeric.h is in libodin-dev 1.8.5-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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tjnumeric.h - description
-------------------
begin : Mon May 5 2003
copyright : (C) 2001 by Thies H. Jochimsen
email : jochimse@cns.mpg.de
***************************************************************************/
/***************************************************************************
* *
* This program 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. *
* *
***************************************************************************/
#ifndef TJNUMERIC_H
#define TJNUMERIC_H
#include <tjutils/tjutils.h>
#include <tjutils/tjvector.h>
/**
* @addtogroup tjutils
* @{
*/
/**
*
* Solve cubic equation x^3 + a x^2 + b x + c = 0 , copied from the GSL-lib
*/
int solve_cubic (double a, double b, double c,
double *x0, double *x1, double *x2);
////////////////////////////////////////////////////////////////////////////////////////
/**
* Calculate random number distributions, the generator is seeded once upon construction
* using the system time.
*/
class RandomDist {
public:
RandomDist();
~RandomDist();
/**
* Calculate Gaussian distribution with given standard deviation, uses GSL random number generator
*/
double gaussian(double stdev) const;
/**
* Calculate uniformly distributed random number in range [0,1), uses GSL random number generator
*/
double uniform() const;
private:
void* rng;
};
////////////////////////////////////////////////////////////////////////////////////////
/**
* Function which is used for optimization
*/
class MinimizationFunction {
public:
/**
* Returns the number of independent fitting parameters
*/
virtual unsigned int numof_fitpars() const = 0;
/**
* Multi-dimensional function to be minimized
*/
virtual float evaluate(const fvector&) const = 0;
};
////////////////////////////////////////////////////////////////////////////////////////
/**
* one-dimensional brute-force minimizer in given interval [low,upp].
* Returns coordinates of minimum.
*/
fvector bruteforce_minimize1d(const MinimizationFunction& f, float low, float upp);
/** @}
*/
#endif
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