You can create an array of radiobuttons at the start of UI as e.g.
hRadioButtons = [ handles.rb1, handles.rb2,...handles.rb15 ];
then
get( hRadioButtons, 'Value' )
will return a vector of all the results.
Alternatively you can create this array by searching your figure for children and check that their type is a UIControl with style 'radiobutton', but that is a little less structured and the ordering in which you get the children will depend (I think) on what order you added them in the UI).
You can also play around with syntax like
handles.( ['rb', str2double(n)] )
to access a radiobutton using a dynamic string. I have done this on occasions when I have named e.g. radio buttons with equivalent names as I have in an enumeration. It does obfuscate the access somewhat for readability and potential bug fixing, but can sometimes be neat if you get it right
