How to use pushbutton and popupmenu

to use , pushbutton position data from a .csv and I can manipulate and store in any variable but when I go to the function no longer exists popupmenu this variable the code is as follows.

function pushbutton1_Callback(hObject, eventdata, handles) %Cargar archivo *.csv

[nombre direccion]=uigetfile('*.csv','Escoger Archivo *.CSV');

if nombre==0

    return 
end

EEGDATOS1=importdata(fullfile(direccion,nombre));

EEGDATOS1=EEGDATOS1.data;

function popupmenu_Callback(hObject, eventdata, handles)

    EEGDA=EEGDATOS1  % in this line gives me the error  HELP

     T7=EEGDA(:,2:2);
     %%Frecuencia de Muestreo y tiempo
     Fs=128;
     T=1/Fs;
     tiempo=size(T7)/Fs;
     tt=0:1/Fs:tiempo;
    H=get(handles.EscogerElectrodo,'Value')
switch H
    case 2 % AF3
        set(handles.mensaje,'String','AF3')
        drawnow();
    case 3 % F7
        set(handles.mensaje,'String','F7')
        drawnow();
      otherwise
end

Answer 1

[Adam]

You need

handles.EEGDATOS1 = EEGDATOS1
guidata( hObject, handles )

at the end of your pushbutton callback and

EEGDA = handles.EEGDATOS1

at the start of your popup menu callback.

Each function in a GUI, just like functions anywhere else that are not nested, has its own scope and workspace. Once the function ends so does its workspace. The call to the guidata function updates the UI's 'handles' structure onto which has now been added your data.

[Efren Lema]

thanks , I was proving but I error

guidata( hObject, handles )

[Adam]

Oops, yes, I made a typo in my answer originally there