how to access variables from one function to another function?

I have created GUI, I am trying to acess variable featureVector from one function to another function.

Kindly help me.

Here is my code of functions:

% --- Executes on button press in pushbutton4.
function pushbutton4_Callback(hObject, eventdata, handles)
 featureVector = extractHOGFeatures(Img);
% --- Executes on button press in pushbutton5.
function pushbutton5_Callback(hObject, eventdata, handles)
Classifier=trainedClassifier;
Label=Classifier.predictFcn(featureVector);

Answer 1

[Guillaume]

The simplest is to store your feature vector in handles.

% --- Executes on button press in pushbutton4.
function pushbutton4_Callback(hObject, eventdata, handles)
    handles.featureVector = extractHOGFeatures(Img);   %store feature vector in handles
    guidata(hObject, handles);   %and save handles
end

function pushbutton5_Callback(hObject, eventdata, handles)
    Classifier=trainedClassifier;
    Label=Classifier.predictFcn(handles.featureVector);  %get feature vector from handles
    ...
end

[zeytun]

How to do this same thing in the Appdesigner? I have a similar issue: in a first function I have a vector "I" (given by a Gaussian function), and I want to use/recall that vector in another function. It looks like simple

app.I = I

is not working.