math_polyint.h

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#ifndef MATH_POLYINT_H
#define MATH_POLYINT_H
 
#include "realarray.h"
 
namespace ModuleBase
{
 
// mohan add 2021-05-07
class PolyInt
{
 
    public:
 
    PolyInt();
    ~PolyInt();
 
    //========================================================
    // Polynomial_Interpolation
    //========================================================
 
    static void Polynomial_Interpolation
    (
        const ModuleBase::realArray &table,
        const int &dim1,
        const int &dim2,
        ModuleBase::realArray &y,
        const int &dim_y,
        const int &table_length,
        const double &table_interval,
        const double &x
    );
 
    static double Polynomial_Interpolation
    (
        const ModuleBase::realArray &table,
        const int &dim1,
        const int &dim2,
        const int &table_length,
        const double &table_interval,
        const double &x            
    );
 
    static double Polynomial_Interpolation            
    (
        const ModuleBase::realArray &table,
        const int &dim1,
        const int &dim2,
        const int &dim3,
        const int &table_length,
        const double &table_interval,
        const double &x            
    );
 
    static double Polynomial_Interpolation
    (
        const double *table,
        const int &table_length,
        const double &table_interval,
        const double &x            
    );
 
    static double Polynomial_Interpolation_xy
    (
        const double *xpoint,
        const double *ypoint,
        const int table_length,
        const double &x            
    );
 
};
}
#endif