This function get the correlation matrix (Rt) of estimated cDCC-GARCH model.
cdcc_correlations(param, stdresids, uncR, ts)
cDCC-GARCH parameters(alpha,beta)
matrix of standrdized(De-GARCH) residual returns (T by N)
unconditional correlation matrix of stdresids (N by N)
ts how many time series are you taking
the correlation matrix (Rt) of estimated cDCC-GARCH model (T by N^2)