2.1.17.2.4.1 fitpoly_range

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 Header to Include
9 Reference

Description

Fit a polynomial equation to a range of a curve.

Syntax

BOOL fitpoly_range( Curve & cc, int ibeg, int iend, int ipolyorder, double * coeff )

Parameters

cc: [input] curve to fit
ibeg: [input] beginning index to fit
iend: [input] ending index to fit
ipolyorder: [input] degree of polynomial equation
coeff: [output] array containing parameter coefficients

Return

Returns TRUE on success and FALSE on failure.

Examples

EX1

bool fitpoly_range_ex1(Curve& crv)
{
	int nBegin = 5;
	int nEnd = 20;
	if( nBegin >= crv.GetSize() && nEnd >= crv.GetSize() )
		return error_report("nBegin and nEnd too large, please update ");
	
	int nPolyOrder = 2;
	vector vCoeff(nPolyOrder+1);
	
	bool bRet = fitpoly_range(crv, nBegin, nEnd, nPolyOrder, vCoeff);
	if( !bRet )
		return error_report("fitpoly_range return false");
	
	for(int ii=0; ii < vCoeff.GetSize(); ii++)
		printf("%g\n", vCoeff[ii]);
	return true;
}

void run_fitpoly_range_ex1()
{
	Worksheet wks = Project.ActiveLayer();
	if( wks && wks.GetNumCols() >= 2 )
	{
		Curve crv(wks, 0, 1);
		fitpoly_range_ex1(crv);
	}
}