www.gusucode.com > ident 案例代码 matlab源码程序 > ident/RawParameterCovarianceforIdentifiedModelExample.m
%% Raw Parameter Covariance for Identified Model %% % Obtain the identified model. load iddata1 z1 sys = tfest(z1,2); %% % Get the raw parameter covariance for the model. cov_data = getcov(sys) %% % |cov_data| contains the covariance matrix for the parameter vector % |[sys.Numerator,sys.Denominator(2:end),sys.IODelay]|. % % |sys.Denominator(1)| is fixed to |1| and not treated as a parameter. The covariance % matrix entries corresponding to the delay parameter (fifth row and column) % are zero because the delay was not estimated.