How can I update a text in app designer when Matlab script is running?

I created a GUI in app designer that a user chooses variables and then it will run the function in Matlab. For this, I tried to use the diary function to write to a file what is output to the command window that would then use drawnow to send to the GUI. I am having problems because I am not sure how to update the label in the GUI with the text output from my function. Attached is the code for trying to set the label and the error message that is given by app designer.

    if options.gui % stop coping outputs to command window and send to GUI
        diary off;
        output = fileread('diary');
        set(app.Label,'string',output); % fill in 'textbox_handle' with the actual handle for the textbox
        drawnow;
    end

• Undefined variable "app" or class "app.Label".*

-Thanks

[Walter Roberson]

Note that reading from the diary is not well defined unless you turn the diary off first.

You should probably be adjusting your code so that the output is saved instead of being displayed so that diary is not needed. If that is not practical, then consider using evalc() to run the functions to capture the output.

Answer 1

[Siddharth Nimbajirao Deore]

call pause for millisecods before your function to render UI elements

 if options.gui % stop coping outputs to command window and send to GUI
        diary off;
        output = fileread('diary');        
        set(app.Label,'string',output); % fill in 'textbox_handle' with the actual handle for the textbox
        pause(0.00000001);
        drawnow;
        end

Answer 2

[Batbayar Temuujin]

textLabel = sprintf('%s', output);

app.Label.Text = textLabel;