void test() 
{ 
//	int FF; 
	vector vP1(20), vP2(20), vP3(20);//these vectors will record the fitted paramters.
	int ii;
	for (ii=1; ii<=19; ii++) 
		{ 
			using NLSF = LabTalk.NLSF; 
			NLSF.Init(); 
			NLSF.Begin(); 
			NLSF.Func$="logECF"; 
			NLSF.FitData$="Data1_B"; 
			if (ii == 1)
			{
				NLSF.p1=0.3; 
				NLSF.p2 = ii*5;//NLSF.p2=5; ?? 
				NLSF.p3=-3; 
			}
			else 
			{
				// fitted parameter value in last loop, because ii starts as 1,
				//so it is not ii-1 but ii-2;
				NLSF.p1 = vP1[ii-2]; 
				NLSF.p2 = vP2[ii-2];
				NLSF.p3 = vP3[ii-2];
			}
			NLSF.v2=0; 
			NLSF.IterateEx(100); 
			NLSF.IterateEx(100); 
			NLSF.ParamWks(); 
			NLSF.PasteParams("P"); 
			NLSF.KeepParam=1; 
			NLSF.End(4);
			//After fitting, record the paramters.
			vP1[ii-1]=NLSF.p1;
			vP2[ii-1]=NLSF.p2;
			vP3[ii-1]=NLSF.p3;
		} 
		
	//then you can use the fitted paramters for any loop by the parameter vectors.
	double aa = vP3[6];//P3 for the 7th loop.
}