MATLAB: What does this error mean

arraycell arraysdigital signal processingdirection findingdoamusicmusic algorithmsignal processing

"Array formation and parentheses-style indexing with objects of class 'phased.RootMUSICEstimator' is not allowed. Use objects of class 'phased.RootMUSICEstimator' only as scalars or use a cell array." I get this error when try to estimate DOA with MUSIC algorithm.
   rootmusicangle = phased.RootMUSICEstimator('SensorArray',ula,...
            'OperatingFrequency',fc,...
            'NumSignalsSource','Property','NumSignals',2);
Thanks in advance

Best Answer

Somehow, phased.RootMUSICEstimator has stopped being a constructor that takes options, and has become a particular phased.RootMUSICEstimator object, and it thinks the 'SensorArray',ula and so on are indices into an array of such objects.
Perhaps at some point there has been a
phased.RootMUSICEstimator = .... something
call ?
Related Question