MATLAB: How to Add selected values of Listbox in MATLAB GUI

listboxMATLAB

function listbox1_Callback(hObject, eventdata, handles)
contents= cellstr(get(hObject,'String'));
listchoice=contents(get(hObject,'Value'));
if(strcmp(listchoice,'a'))
    lis1=10;
elseif(strcmp(listchoice,'b'))
    lis1=20;
elseif(strcmp(listchoice,'c'))
    lis1=30;
elseif(strcmp(listchoice,'d'))
    lis1=40;
elseif(strcmp(listchoice,'e'))
    lis1=50;
end
assignin('base','lis1',lis1);
i have created a listbox with five options with their respected values and when i select more than 1 option , I want the result to be added in the respective listbox.

Best Answer

This is not the best way but a working solution! 
function listbox1_Callback(hObject, eventdata, handles)
contents= cellstr(get(hObject,'String'));
lischoice=contents(get(hObject,'Value'));
if numel(lischoice)>=2
choice1 = lischoice(1);
choice2 = lischoice(2);
    if (strcmp(choice1,'a'))
        l1=0.10;
    elseif (strcmp(choice1,'b'))
        l1=0.20;
    elseif (strcmp(choice1,'c'))
        l1=0.30;
    end
    if (strcmp(choice2,'a'))
        l2=0.10;
    elseif (strcmp(choice2,'b'))
        l2=0.20;
    elseif (strcmp(choice2,'c'))
        l2=0.30;
    end
l_value = l1 + l2;
else
    if (strcmp(lischoice,'a'))
        l_value = 0.10;
    elseif (strcmp(lischoice,'b'))
        l_value = 0.20;
    elseif (strcmp(lischoice,'c'))
        l_value = 0.30;
    end
end
assignin('base','l_value',l_value);
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