mathfunc.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <math.h>
#include <string.h>
#include <time.h>
#include "include/mathfunc.h"

Functions
void	emptyFIT (FIT *fit)
void	initFIT (FIT *fit)
int	writeFIT (FIT *fit, char *filename)
int	setmemFIT (FIT *fit, int voiNr)
void	printFIT (FIT *fit)
int	readFIT (char *filename, FIT *fit)
int	functionformatFIT (int type, char *str)
int	functionnameFIT (int type, char *str)
int	evalFIT (FitVOI *r, double x, double *y)
int	evaltacFIT (FitVOI *r, double *x, double *y, int dataNr)
int	ievalFIT (FitVOI *r, double x, double *yi)
int	ievaltacFIT (FitVOI *r, double *x, double *yi, int dataNr)
int	devalFIT (FitVOI *r, double x, double *yd)
int	devaltacFIT (FitVOI *r, double *x, double *yd, int dataNr)

---

Function Documentation

int devalFIT (  FitVOI *  r, double  x, double *  yd )

Evaluates yd=Df(x). Returns: Returns 0, if ok. Parameters: r  Fit parameters of a single region x  Time where to evaluate the derivative of the function yd  The derivative of the function is returned here

int devaltacFIT (  FitVOI *  r, double *  x, double *  yd, int  dataNr )

Evaluates an array yd[i]=Df(x[i]). Returns: Returns 0, if ok. Parameters: r  Fit parameters of a single region x  Times where to evaluate the function derivatives yd  Array for the function derivatives dataNr  Nr of (x,yd) data

void emptyFIT (  FIT *  fit  )

Free memory allocated for FIT. All contents are cleared.

int evalFIT (  FitVOI *  r, double  x, double *  y )

Evaluate y=f(x). Returns: Returns 0, if ok. Parameters: r  Fit parameters of a single region x  Time where to evaluate the function y  The value of the function is returned here

int evaltacFIT (  FitVOI *  r, double *  x, double *  y, int  dataNr )

Evaluates an array y[i]=f(x[i]). Returns: Returns 0, if ok. Parameters: r  Fit parameters of a single region x  Times where to evaluate the function y  Array for the function values dataNr  Nr of (x,y) data

int functionformatFIT (  int  type, char *  str )

Copies the description of a function type to the specified string which must have space for >=128 characters. Parameters: type  The number of function str  Representation of the format of the function

int functionnameFIT (  int  type, char *  str )

Copies the name of the function to the specified string which must have space for >=128 characters. Parameters: type  The number of function str  Name of the function

int ievalFIT (  FitVOI *  r, double  x, double *  yi )

Evaluates yi=Integral of f(x) between 0 and x. Returns: Returns 0, if ok. Parameters: r  Fit parameters of a single region x  Time where to evaluate integral of the function yi  The integral value of the function is returned here

int ievaltacFIT (  FitVOI *  r, double *  x, double *  yi, int  dataNr )

Evaluate an array yi[i]=Integral of f(x[i]) between 0 and x. Returns: Returns 0, if ok. Parameters: r  Fit parameters of a single region x  Times where to evaluate the function integrals yi  Array for the function integral values dataNr  Nr of (x,yi) data

void initFIT (  FIT *  fit  )

Initiate FIT structure. Call this once before first use.

void printFIT (  FIT *  fit  )

Print to stdout the contents of FIT data structure. Mainly for testing purposes.

int readFIT (  char *  filename, FIT *  fit )

Read FIT file contents to the specified data structure, emptying its old contents. Returns: In case of an error, >0 is returned, and a description is written in fiterrmsg.

int setmemFIT (  FIT *  fit, int  voiNr )

Allocate memory for FIT data. Any previous contents are destroyed.

int writeFIT (  FIT *  fit, char *  filename )

Write function parameters in FIT into specified file. If necessary, a backup file (*%) is created. In case of an error, >0 is returned, and a description is written in fiterrmsg.

---