ROOT   Reference Guide
ChebyshevPol.cxx
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1// @(#)root/mathcore:$Id$
3
4/*************************************************************************
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. * 9 * For the list of contributors see$ROOTSYS/README/CREDITS. *
10 *************************************************************************/
11
12//////////////////////////////////////////////////////////////////////////
13// //
14// Functions for the evaluation of the Chebyshev polynomials and the //
15// ChebyshevPol class which can be used for creating a TF1. //
16// //
17//////////////////////////////////////////////////////////////////////////
18
19#include "Math/ChebyshevPol.h"
20
21namespace ROOT {
22 namespace Math {
23 namespace Chebyshev {
24 template<> double T<0> (double ) { return 1;}
25 template<> double T<1> (double x) { return x;}
26 template<> double T<2> (double x) { return 2.0*x*x -1;}
27 template<> double T<3> (double x) { return 4.0*x*x*x -3.0*x;}
28
29 template<> double Eval<0> (double , const double *c) { return c[0];}
30 template<> double Eval<1> (double x, const double *c) { return c[1]*x + c[0];}
31 template<> double Eval<2> (double x, const double *c) { return c[2]*Chebyshev::T<2>(x) + c[1]*x + c[0];}
32 template<> double Eval<3> (double x, const double *c) { return c[3]*Chebyshev::T<3>(x) + Eval<2>(x,c); }
33 }
34 }
35}
#define c(i)
Definition: RSha256.hxx:101
Double_t x[n]
Definition: legend1.C:17
Namespace for new Math classes and functions.
double Eval< 3 >(double x, const double *c)
double Eval< 2 >(double x, const double *c)
double T< 1 >(double x)
double T< 2 >(double x)
double T< 3 >(double x)
double Eval< 0 >(double, const double *c)
double T< 0 >(double)
double Eval< 1 >(double x, const double *c)
VSD Structures.
Definition: StringConv.hxx:21