How to load a .mat file with a push button, calculate the data using my own functions and plot a figure in a GUI made in GUIDE.

Hi everyone,

I am very new at this with making GUIs. I have a .mat file (consisting of 4 separate variables) that I am uploading using a push button in a GUI and using the code:

function load_file_pushbutton_Callback(hObject, eventdata, handles)

% hObject    handle to load_file_pushbutton (see GCBO)

% eventdata  reserved - to be defined in a future version of MATLAB

% handles    structure with handles and user data (see GUIDATA)

filename = uigetfile('*.mat'); 

handles.data = load(filename);

I now want to change the data in the .mat file with a few functions I have written before as .m files (which I of course can copy into the GUI .m file) and plot a figure using a different pushbutton. Can anyone please help me?

Thanks in advance!

[Azzi Abdelmalek]

Clarify what help you need

[Andreas Ingelström]

I have a GUI with three push buttons (one to load the .mat file, one to create one type of figure and one to create another type), two text fields were I would like to type in parameters to adjust the figures and finally the figure itself.

When I have loaded the .mat file I would like to be able to get hold of the four variables in it when I call for them in other callbacks and other functions I have to adjust the variables and finally plot the data.

I have attached an image of how I would like my GUI to look like.

[Andreas Ingelström]

If I use guidata(hObject, handles) to update the handle and let's say my .mat file consists of the variables p, t, x and y. How can I be able to call for the p matrix in another callback, change it and the save it for further use? Will handles.data.p work?

Answer 1

[Geoff Hayes]

Andreas - yes, if your mat file consists of the variables p, t, x, and y, then if your first pushbutton callback does

 function load_file_pushbutton_Callback(hObject, eventdata, handles)

 filename = uigetfile('*.mat'); 
 handles.data = load(filename);
 guidata(hObject,handles);

then you will be able to access these variables in any other callback through (for example)

 handles.data.x