How to display result in Text Area in Matlab Appdesigner

Hi, I have a problem here where I could not display my result of the equation in the text area.

Below is the code.

The app.EIRP.Value is the text area.

          pt = app.ouputpower.Value;
          lbo = app.backoffloss.Value;
          lbf = app.eartbranchingloss.Value;
          at = app.antennagain.Value;
          lu = app.uplinkloss.Value;
          lp = app.pathloss.Value;
          gte = app.gteratio.Value;
          bfb = app.satbranchingloss.Value;
          br = app.bitrate.Value;
          
          app.EIRP2 = pt+at-lbo-lbf;
          
          app.EIRP.Value = num2str(eval(app.EIRP2));

[Zain Ul Abidin]

How Can I add nultiple line in a single text area using differnt sprint commands

Answer 1

[Adam Danz]

It's unclear whether you're working with numeric or text values. App designer has edit fields that return text and edit fields that return numeric values.

If you're working with text edit fields that contain numeric characters such as '42', you must convert them to numeric, do the math, then convert the result back to character (or string). Consider replacing the text edit fields with numeric edit fields

pt = str2double(app.ouputpower.Value); % converts from string/char to double
app.EIRP.Value = num2str(app.EIRP2);   % converts from numeric to char 
% -or - 
app.EIRP.Value = sprintf('%.3f',app.EIRP2);  % converts from numeric to char 

% No need for eval (Ever) 

If you're working with numeric edit fields there is no need to do any conversion.

pt = app.ouputpower.Value; 
app.EIRP.Value = app.EIRP2;  

[Noor Zaim Syafiq Nor Azam]

For edit field area, I have used Numeric and I have done like this code

pt = app.ouputpower.Value; 
app.EIRP.Value = app.EIRP2; 

But there's an error appear that is

'No public property EIRP2 exists for class LinkBudgetApp.'

What does that means?

[Adam Danz]

I took that line from your code. You can adapt those variables to this form

app.A.Value = B

where app.A is a numeric text box and B is a numeric value.

[update]

In the code from your comment above, the first line (pt) should produce a numeric value. Does it? I'm assuming that's the value you want to assign to the numeric text field.

[Malu]

Hello,

as I am not much familiar with App Designer, I would ask for your help regarding a similar issue.

I have a button with a callback function, where I am doing my calculations. In the end I have some results I would like to display in the TexEdit Field.

avgDiff = mean(diff(timestamp')); %checking the acquisiton rate
        fprintf('The average timestamp diff is %.3f\n',  avgDiff)
Sync_rate =  (S/5) * 100 ;
fprintf('The synchronization rate  is:  %.2f\n', Sync_rate )

How can I write in the end of the function that it displays these values?

app.status(end+1,1) = {'Sync rate is...  and then to display : "Avg timestamp diff is"'};
               set(app.StatusWindowTextArea,'Value',app.status)
               set(app.StatusColour,'Background',[0 1 0])
              
            end
            pause(1)

Thank you in advance!

[Adam Danz]

You can use sprintf to create a string that includes values from your variables. See examples in the link.

Then assign the string to the text box in the app using

app.TextBox.Value = ______

Answer 2

[Bill Llach]

if you have a complex number vector just use:

evalc('anything')

Example:

someArray = [1 2 1 2];

theThingYouWantToShow = roots(someArray);

%theThingYouWantToShow is a vector with complex numbers (if you can show this, you can show anything :) (I guess) )

app.SomeTextArea.Value = evalc('theThingYouWantToShow');

[Adam Danz]

Also see formattedDisplayText

https://www.mathworks.com/matlabcentral/discussions/highlights/134262-new-in-r2021a-capture-disp-output-as-a-string

Answer 3

[Diego Roa]

¿Como imprimir una función de transferencia en un texteditfield ?