MATLAB: Retrieving Svensson’s model parameters – On what order are these parameters provided

Financial Instruments Toolboxparameterssvensson

After creating a Svensson model I would like to store the parameters calculated by the fitSvensson function.
I already know I can get the six parameters (Beta0, Beta1, Beta2, Beta3, Tau1, Tau2) from the model's "Parameters" attribute but I have no idea about on what order are these parameters provided. I searched the documentation but up to this time I found no reference to this information.
The example (below – and _ here _) doesn't help very much.
Settle = repmat(datenum('30-Apr-2008'),[6 1]);
Maturity = [datenum('07-Mar-2009');datenum('07-Mar-2011');...
datenum('07-Mar-2013');datenum('07-Sep-2016');...
datenum('07-Mar-2025');datenum('07-Mar-2036')];
CleanPrice = [100.1;100.1;100.8;96.6;103.3;96.3];
CouponRate = [0.0400;0.0425;0.0450;0.0400;0.0500;0.0425];
Instruments = [Settle Maturity CleanPrice CouponRate];
PlottingPoints = datenum('07-Mar-2009'):180:datenum('07-Mar-2036');
Yield = bndyield(CleanPrice,CouponRate,Settle,Maturity);
SvenssonModel = IRFunctionCurve.fitSvensson('Zero',datenum('30-Apr-2008'),Instruments);
SvenssonModel.Parameters
ans =
      0.0002    3.7616  -24.5489   34.3165   10.8867   11.9282
Which one is Beta1? Which one is Tau2? Any clues?
Thank you in advance and Merry Christmas to all of you!
Fernando

Best Answer

According to the source code (IRFunctionCurve.m):
% The fitted parameters can be recovered from the Parameters % field and are the following: (Beta0, Beta1, Beta2, Beta3, % Tau1, Tau2)
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