How can I display extracted feature value from HOG ?

Did I write a correct code of HOG ? I want to extract HOG features ,visualize the result and also I want to display the result in x statix box named 'FE'. I also want to put 'BlockOverlap' but I dont know how to code that. Can someone help me? Below is my code :-

function feature_Callback(hObject, eventdata, handles)
a= getimage(handles.axes2)

[hog1,visualization] = extractHOGFeatures(a,'CellSize',[4 4],'BlockSize',[2 2],'NumBins',70); 
axes(handles.axes3)
imshow(a); 
hold on;
plot(visualization,'color','magenta');

set(handles.FE,'String',hog1)