2.10556	0.13497
2.25417	0.1951
2.40556	0.24147
2.54583	0.30253
2.69306	0.32074
2.83194	0.31069
2.96111	0.2639
3.09861	0.19809

//	Let's fill the start fitting parameters
vector vParams(4);
vParams[0] = 0;			// y0
vParams[1] = 2.7;		// xc
vParams[2] = 0.9;		// w
vParams[3] = 0.3;		// A

//	Start fitting
NLFitSession FitSession;
if( !FitSession.SetFunction("Gauss")) {
	out_str("invalid fit function");
	exit(0);
}
if( !FitSession.SetData(vxPeaks, vyPeaks)) {
	out_str("fail to set data");
	return;
}

//	Set the parameters to start values
if( !FitSession.ParamsInitValues()) {
	out_str("fail to initialize parameters");
	return;
}
if( 0 != FitSession.SetParamValues( vParams ) ) {
	out_str("fail to set parameters");
	return;
}    
FitSession.SetParamFix(0,true); // Fix the offset to zero
FitSession.GetChiSqr();

//	Now, we fit!
int nOutcome;
if( !FitSession.Fit(&nOutcome) ) {
	printf("Fail to do fitting: %d\n", nOutcome);
	continue;
}
vector vParamValues, vErrors;
FitSession.GetFitResultsParams(vParamValues, vErrors);