(App Designer) show the variables from another function, in a dropdown?

I have loaded a file, and in a dropdown list I would like to have the variables from the loaded file, with which I can work and show graphics after selecting one of the variables(in the dropdown)?

My variables contain always values in a Matrix or array.

Answer 1

[Sahithi Kanumarlapudi]

Hi,

If you know what the variables are, you could use the 'Items' property of uidropdown() function by assigning it to your variables.

The following link has several examples on how to create a drop down and how to assign items, values to the dropdown list

https://www.mathworks.com/help/matlab/ref/uidropdown.html

Hope this helps!

[Dibran Kodra]

Hello Kanumarlapudi,

thank you for your answer.

My problem is that I have to work with different files, which include different variables. I have created a load Button as followed

function LoadButtonPushed(app, event)

[filename,filepath]=uigetfile(['*.mat'],'Load File','MultiSelect','off');

if isequal(filename,0)

disp('load(filename)')

else

try

load(filename);

app.Data = importdata(filename);

app.FilenameEditField.Value=filename; %Show the file name here

app.FilepathEditField.Value=filepath; %Show the file path

catch

errordlg(['There was a problem loading the .mat','file'],'Load Error!');

return;

end

end

After I load the file, I would like to work with a specific variable(all variables contain different arrays), from which I will filter the data or find specific requests like peek and valley from the graph of the chosen data. And to do this I would like to have the option that the variables will be shown in a drop down where I can choose which one I like to work with.

For the DropDown I used this code, but with evalin both options 'base' or 'caller' doesnt get me the variables I need. And the loaded file and its content will not be shown at the base workspace.

function DropDownOpening(app, event)

vars = evalin('base','whos');

cell_array = cell(size(vars));

for i=1:length(vars)

cell_array{i} = vars(i).name;

end

app.DropDown.Items = cell_array;

end

Thank you for your time. I hope I could explain my problem a little bit better.