Create table in AppDesigner

I want to create a table structure that I can use within my program to store and fetch information. However, the code below results in an error of "Unrecognized function or variable 'varTypes" ". Could you direct me on what I am missing? I have a workaround but I would like to understand why the previously defined variables are not seen by the program.

properties (Access = public)
Property % Description
varNames = ["MMSI", "LAT", "LONG", "SOG", "VesselName", "VesselType", "Length", "Width"];
varTypes = ["double", "double", "double", "double", "string", "double", "double", "double"];
ship1 = table('Size',[20 8],'VariableTypes',varTypes,'VariableNames',varNames);
end

Answer 1

[Allen]

You cannot define variables within the properties class section. You can only define your app's properties there. If you want to only use the properties section to define you table then consider the following.

properties (Access = public)
    ship1 = table('Size',[20 8], ...
        'VariableTypes',["double", "double", "double", "double", "string", "double", "double", "double"], ...
        'VariableNames',["MMSI", "LAT", "LONG", "SOG", "VesselName", "VesselType", "Length", "Width"]);
end

Else, you would could define varNames and varTypes as properties and then use those properties to setup your table in the startupFcn.

properties (Access = public)
    varNames = ["MMSI", "LAT", "LONG", "SOG", "VesselName", "VesselType", "Length", "Width"];
    varTypes = ["double", "double", "double", "double", "string", "double", "double", "double"];
    ship1 {table}
end

% Callbacks that handle component events
methods (Access = private)

    % Code that executes after component creation
    function startupFcn(app)
        app.Ship1 = table('Size',[20 8],'VariableTypes',app.varTypes,'VariableNames',app.varNames);
    end
end

[Juan Romero]

Thanks for the explanation, this solved my issue.

[Allen]

Juan, glad to help. Be sure to accept the answer so that others looking for a similar solution may also find this helpful.