Error with parsing data from one window to another in app designer

Hello All,

Ik keep having the error "Unable to use a value of type Analyzer as an index.". Even though Analyzer is not a Variable or Function it is the name of my MainApp. I would like to snd data from one window to another and thought I had done all correct and now I get this error but I don't kno wwhere to look anymore cause I dont understand this has something to do with indexing. So Ill show my code below and maybe someone could point me out what I do wrong.

First some properties which I have in the MainApp called "Analyzer

properties (Access = private)

frmPreferences;

X1; %X1 = raw selected data from Load data class

X2;

Y1; %Y1 = raw selected data from Load data class

Y2; %Y2 = raw selected data from Load data class

YBprocessed;

YRprocessed;

Xprocessed;

StartSample;

EndSample;

SampleFrequency;

FileName;

CallData;

end

Then When I would press on the menubar the option "Preferences" I want another window opens. In this case it sends from the main window to the Preference Window a number (SampleFrequency). This is for testing purposes

function PreferencesMenuSelected(app, event)

t = num2str(app.SampleFrequency);

app.frmPreferences = app.frmPreferences(app, t);

end

Next the code in the second window called "frmPreferences" with its properties

properties (Access = private)

Callingapp;

end

And the code when the window get opened:

function startupFcn(app, Analyzer, DatafrmAnalyzer)

app.Callingapp = Analyzer;

app.lblSampleFreq.Text = DatafrmAnalyzer;

end

I have also tried to rename Analyzer but this dont make any differences. So I hope someone can help me a bit.

Thanks in advance

Answer 1

[Kevin Holly]

I like to keep things simple and just read from main app.

Main app (Analyzer):

properties (Access = private)
        frmPreferences;
        X1;     %X1 = raw selected data from Load data class
        X2;     
        Y1;     %Y1 = raw selected data from Load data class
        Y2;     %Y2 = raw selected data from Load data class
        YBprocessed;
        YRprocessed;
        Xprocessed;
        StartSample;
        EndSample;
        SampleFrequency;
        FileName;
        CallData;
end

  function PreferencesMenuSelected(app, event)
           app.frmPreferences = frmPreferences(app);
  end  

frmPreferences:

  properties (Access = private)
        Callingapp;
  end

  function startupFcn(app, Analyzer)
            app.Callingapp = Analyzer;
            app.lblSampleFreq.Text = num2str(app.Callingapp.SampleFrequency);
  end

OR

If you need to use t again, you could save it as a property of the main app.

Main app (Analyzer):

properties (Access = private)
        frmPreferences;
        X1;     %X1 = raw selected data from Load data class
        X2;     
        Y1;     %Y1 = raw selected data from Load data class
        Y2;     %Y2 = raw selected data from Load data class
        YBprocessed;
        YRprocessed;
        Xprocessed;
        StartSample;
        EndSample;
        SampleFrequency;
        FileName;
        CallData;
        t
end

  function PreferencesMenuSelected(app, event)
           app.t = num2str(app.SampleFrequency);
           app.frmPreferences = frmPreferences(app);
  end  

frmPreferences:

  properties (Access = private)
        Callingapp;
  end

  function startupFcn(app, Analyzer)
            app.Callingapp = Analyzer;
            app.lblSampleFreq.Text = app.Callingapp.t;
  end
  

[Raymond Gilbers]

ahhh thanks a lot I even did not know I could call variable from the main app with the syntaxis

app.Callingapp.t

Much appreciated!