MATLAB: How to make a list of iddata objects

cell arraysiddata

I'm loading data from a bunch of csv files and making each one into a iddata object.
How do I create a collection from the resulting iddata objects?
I thought cell arrays were the way to go (as described here) but I'm getting a criptic error
Code snippet:
% Store data sets in this cell array
dataSets = {};
 
% Loop through files
for k = 1 : length(theFiles)
    file = theFiles{1, k};
    fprintf(1, "Reading file '%s'\n", file.name);
    filePath = fullfile(file.folder, file.name);
    % Read data from file
    dataTable = readtable(filePath);
    % Create dataset object for system identification
    inputData = table2array(dataTable(:,2:3));
    outputData = table2array(dataTable(:,4:5));
    dataSet = iddata(outputData,inputData);
    dataSets = [dataSets, dataSet]; 
end
The line
dataSets = [dataSets, dataSet];
generates this error message:
Undefined function 'realdata' for input arguments of type 'cell'.
Error in iddata/horzcat (line 19)
reald = realdata(dat);

Best Answer

Here is a solution. Use the index to assign to the cell array:
% Loop through files
for k = 1 : length(theFiles)
    file = theFiles{1, k};
    fprintf(1, "Reading file '%s'\n", file.name);
    filePath = fullfile(file.folder, file.name);
    % Read data from file
    dataTable = readtable(filePath);
    % Create dataset object for system identification
    inputData = table2array(dataTable(:,2:3));
    outputData = table2array(dataTable(:,4:5));
    dataSet = iddata(outputData,inputData);
    dataSets{k} = dataSet; 
end
Related Question