V = group(V,Grp)
V [ VAR ] - Panel VAR object estimated on multiple groups of data.
Grp [ char ] - Requested group name; must be one of the names specified when the panel VAR object was constructed using the function VAR.
V [ VAR ] - VAR object for the K-th group of data.Create and estimate a panel VAR for three variables, x, y, z, and three countries, US, EU, JA. Then, retrieve a plain VAR for an individual country.
v = VAR({'x','y','z'},{'US','EU','JA'});
v = estimate(v,d,range,'fixedEffect=',true);
vi_us = group(v,'US');