MATLAB: Does button group not work

button groupguiguideradio button

Hi Guys,
I am making a GUI which, to all intents and purposes, plots some data. I wanted a set of radio buttons to change the plot colour. To make sure only one colour was selected I used a button group. When I ask to see the radio button call back I am told the uiButtonGroup (plotColour) is managing the call back. This is my button group SelectionChangeFcn code :
 function plotColour_SelectionChangeFcn(hObject,eventdata)
 switch get(hObject,'Tag') % Get Tag of selected object.
    case 'Blue'
        setappdata(handles.figure1,'Colour','blue')
    case 'Red'
        setappdata(handles.figure1,'Colour','red')
    case 'Green'
        setappdata(handles.figure1,'Colour','green')
    case 'Yellow'
        setappdata(handles.figure1,'Colour','yellow')
    case 'Black'
        setappdata(handles.figure1,'Colour','black')
    case 'cyan'
        setappdata(handles.figure1,'Colour','cyan')
    case 'Magenta'
        setappdata(handles.figure1,'Colour','magenta')
    otherwise
end
This is the section of code which plots the data:
 global noFiles
 global plotLength
 dataStore = getappdata(handles.figure1 , 'dataStore');
 f = getappdata(handles.figure1 , 'f');
 plotColour_SelectionChangeFcn(hObject,eventdata)
 colour = getappdata(handles.figure1,'Colour');
 hold on
 for i = 1:noFiles
    plot(f(2:plotLength),dataStore(2:plotLength,i),'color',colour)
 end
 hold off
Before this I initialise 'Colour' to blue with:
 setappdata(handles.figure1,'Colour','blue')
The figure plots so I know it is executing the line :
 plotColour_SelectionChangeFcn(hObject,eventdata)
But It doesn't seem to be updating the 'Colour' value. Its almost as if none of the tags in the switch/case loop are matching, but I don't know why. I have check and doubled checked the tags for the radio buttons in the property inspector.
Any help would be really appreciated, Thanks in advance 🙂
Tim

Best Answer

First, the keyword is the American spelling of 'color' :)
Second, you don't want to set the figure's color but rather the handle to the plots' color (whether it be a line patch or whatever.
function example_buttongroup
figure;
axes('pos',[.3 .3 .5 .5]);
hL = plot(1:10);
huib = uibuttongroup('selectionchangefcn',{@schange, hL},'pos',[.1 .1 .2 .2]);
uicontrol('style','radio','string','b','parent',huib,'units','norm','pos',[.1 .5 .4 .4]);
uicontrol('style','radio','string','r','parent',huib,'units','norm','pos',[.1 .1 .4 .4]);
function schange(src,evt,hL)
set(hL,'color',get(evt.NewValue,'string'));
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