matlab buttongroup switch case按钮组回调函数

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S.fh = figure('units','pixels',...
              'position',[200 250 250 200],...
              'menubar','none',...
              'name','GUI_41',...
              'numbertitle','off',...
              'resize','off',...
              'closerequestfcn',{@fh_crfcn});
S.bg = uibuttongroup('units','pix',...

'pos',[20 70 210 90]);

S.SEL = 1; % The selectedobject property of S.bg

S.rd(1) = uicontrol(S.bg,...
                    'style','rad',...
                    'unit','pix',...
                    'position',[20 50 70 30],...
                    'string','Linear');

S.rd(2) = uicontrol(S.bg,...
                    'style','rad',...
                    'unit','pix',...
                    'position',[20 10 70 30],...
                    'string','Quadratic');
S.rd(3) = uicontrol(S.bg,...
                    'style','rad',...
                    'unit','pix',...
                    'position',[120 50 70 30],...
                    'string','Cubic');
S.rd(4) = uicontrol(S.bg,...
                    'style','rad',...
                    'unit','pix',...
                    'position',[120 10 70 30],...
                    'string','Quartic');

function [] = pb_call(varargin)

sel = findobj(get(S.bg,'selectedobject')); % See BUG note in GUI_8
S.SEL = find(S.rd==sel); % Store current radiobutton.

switch sel
            case S.rd(1) % Linear
                S.RP(1:3) = 0;
                S.COL = 'r';
            case S.rd(2) % Quadratic
                S.RP(1:2) = 0;
                S.COL = 'k';
            case S.rd(3) % Cubic
                S.RP(1) = 0;
                S.COL = 'b';
            case S.rd(4) % Quartic
                S.COL = 'm';
            otherwise
                % Very unlikely I think.
        end