New SystemPrior class

[ripatti]

Dear Musketeers,

I used to estimate models with system priors. I love it!

My code for system priors used to look like

sp = systempriors(m);
sp = prior(sp,'.std_Mtreat/.std_Etrend',distribution.Normal.fromMeanStd(0.5,0.3),'lowerbound',0.01);

(I am just placing a prior to relative stds of measurement and shock equations. )

The current release has a new system. I am a bit confused after investigating the tutorial in https://github.com/IRIS-Solutions-Team/Tutorial-System-Priors/blob/master/run06_estimateParameters.m

To update the above I do the following

sp = SystemPriorWrapper.forModel(m);
sp.addSystemPrior('std_Mtreat/.std_Etrend', distribution.Normal.fromMeanStd(0.5,0.3),'lowerbound',0.01);

I guess this does the same thing?

The tutorial describes the "systemProperty". I guess it is not necessary here since the prior does not concern model solutions? I dot not quite get the S-notation (and X-notation) in the tutorial!

what does
seal()
do? Is it necessary?

Best,

Antti R.