Matlab GUI编辑文本加倍

Question

有人能告诉我这段代码有什么问题吗？

c = str2double(get(handles.edit6,'String'));

或者我怎样才能将编辑输入变为c的值？

命令窗口显示：'Warning: Infinite or Not-a-Number value encountered. ' (input of edit6 is '0')

孔函数代码：

function pushbutton1_Callback(hObject, eventdata, handles)
kpr = get(handles.slider1,'Value');
kir = get(handles.slider2,'Value');
kdr = get(handles.slider3,'Value');
e = handles.e;
a = 0;
b = 0;
c = str2double(get(handles.edit6,'Value'));
for t = handles.time;
    ealt = e;
    if t<handles.sprung
        e = 0;
    else 
        e = (a*t^2)+(b*t)+ c;
    end
    B(1,handles.ix) = e;
    dedt = (e -ealt)/handles.h;
    y = e*kpr + kir*(integral(@(x) 0*x+e,0,t-handles.sprung)) + kdr*dedt; 
    A(1,handles.ix) = y;
    handles.ix = handles.ix+1;  
    hold on
    plot(t,e)
end
handles.A = A;
plot(handles.time,handles.A,'r')