Hi Jose.
Firstly, I'm assuming that you have a separate MATLAB function saved as a ".m" file which generates the graphic that you want to display in the app.
Add the folder where this graphic code is stored to the path of the app.
addpath('<Folder_Path>');
Now, call the function in the app.
mygraphic = graphic_function(data); % data is the input
To link this graphic to the existing UIAxes, use "imshow".
imshow(mygraphic, 'Parent', app.UIAxes);
The parent of the graphic is the UIAxes in this case.
You can create a startupFcn from App designer and include all the above mentioned steps there if you would like to first load the graphic into the UIAxes every time the app is executed.
