Undefined function 'stop' for input arguments of type 'double'.

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KAI XUN CAI 2017-11-1

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/364382-undefined-function-stop-for-input-arguments-of-type-double

评论： Stephen23 2017-11-1

% function frameshow_Callback(hObject, eventdata, handles)
global t  
global t1
t1=timer('TimerFcn',{@timerCallback1,handles},'ExecutionMode', 'fixedDelay','Period', 0.1);
guidata(hObject,handles);
stop(t);
start(t1);
function timerCallback1(hObject, eventdata, handles)
global vid
global t1
global frame
%
if (vid==-1)
    msgbox('first show！');
    stop(t1);
    return;
end
axes(handles.axesshow);
frame=getsnapshot(vid);
imshow(frame);

i use this function to start camera but show the error:

Undefined function 'stop' for input arguments of type 'double'.
Error in colordetect>frameshow_Callback (line 55)
stop(t);
Error in gui_mainfcn (line 95)
        feval(varargin{:});
Error in colordetect (line 17)
    gui_mainfcn(gui_State, varargin{:});
Error in
matlab.graphics.internal.figfile.FigFile/read>@(hObject,eventdata)colordetect('frameshow_Callback',hObject,eventdata,guidata(hObject)) 
Error while evaluating UIControl Callback.