How to make a list of iddata objects

Question

Bill Tubbs 2020-3-22

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/512301-how-to-make-a-list-of-iddata-objects

回答： Bill Tubbs 2020-3-22

采纳的回答： Bill Tubbs

在 MATLAB Online 中打开

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);

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Bill Tubbs 2020-3-22

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Answer 1

Bill Tubbs 2020-3-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/512301-how-to-make-a-list-of-iddata-objects#answer_421379

在 MATLAB Online 中打开

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