i get the message - The value of the "OutputData" property must be a double matrix or a cell array of such matrices. How can i fix this issue?

Am conducting system identification in Matlab model i have of a PV UPQC and trying to identify the output of the DC capacitor voltage

Answer 1

[Shantanu]

Hi Alan,

You can use curly brace {} indexing to extract the raw data. This pulls the numerical values directly into a matrix. Here is an example snippet explaining the same

% Let's assume your data is in a table 'T'. 
% Columns 2 and 3 are inputs, and columns 4 and 5 are outputs. 
Ts = 0.01; % Your sampling time 
% Directly create the iddata object using curly brace indexing 
dataSet = iddata( T{:, 4:5}, T{:, 2:3}, Ts ); 

For more information on indexing in MATLAB check

https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-table.html

https://www.mathworks.com/company/technical-articles/matrix-indexing-in-matlab.html

You can refer to the following

https://www.mathworks.com/matlabcentral/answers/512300-creating-iddata-from-data-in-tables