How to show an updating image generated by "drawnow" in GUI axes1

Question

Wenlong 2014-5-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/131683-how-to-show-an-updating-image-generated-by-drawnow-in-gui-axes1

评论： Image Analyst 2014-5-30

Hi All, I would like to show an updating image generated by "drawnow" in GUI axes1. This is my code:

 function Start_Callback(hObject, eventdata, handles)
set(handles.Start,'string','Running','enable','off');
QuasiBrownianMotion_Co_TimeControl_forGUI;
 axes(handles.axes1);
  drawnow;
% Update handles structure
guidata(hObject, handles);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
"QuasiBrownianMotion_Co_TimeControl_forGUI" is a function I used to generate images.

The problem right now is whenever I run GUI and hit start button. Matlab always pop out another new image window to show the images instead of showing within axes1. Could anyone help me out? Thanks a lot! Wenlong

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Wenlong 2014-5-29

编辑：Wenlong 2014-5-29

在 MATLAB Online 中打开

Hi Geoff, Thanks for your valuable comments first! I am sorry for the missing info! Yes, QuasiBrownianMotion_Co_TimeControl_forGUI also has the command "drawnow".

   function QuasiBrownianMotion_Co_TimeControl_forGUI
   global state
   handles=guidata(gcbo);
   colormap gray;
   state.h.timer=timer('TimerFcn',@Beat_Co_TimeControl_Circle_forGUI,'ExecutionMode','fixedDelay','Period',.005);
start(state.h.timer);
 function Beat_Co_TimeControl_Circle_forGUI(varargin)
 global state 
 handles=guidata(gcbo);
a = tic;
while 1
    state.cur_time = toc(a)
    if state.cur_time<state.t
k=1;
%change the speed here
        while k<state.Nr+state.Nc+1
            Bx=unique(get(state.p{k},'xdata'));Bx=Bx([1,end]);
            By=unique(get(state.p{k},'ydata'));By=By([1,end]);
                if By(1)<=0 
                    state.Vy(k)=-state.Vy(k);
                     elseif By(2)>=1 
                    state.Vy(k)=-state.Vy(k);
                end
                if Bx(1)<=0
                    state.Vx(k)=-state.Vx(k);
                     elseif Bx(2)>=1  
                    state.Vx(k)=-state.Vx(k);
                end
                axes(handles.axes1);
    set(state.p{k},'xdata',get(state.p{k},'xdata')+state.Vx(k),'ydata',get(state.p{k},'ydata')+state.Vy(k));
%     axes(handles.axes1);
    drawnow;
    k=k+1;
        end

Here I put more code to make it clear. I put the axes(handles.axes1) statement before the call to QuasiBrownianMotion_Co_TimeControl_forGUI and also tried to move it ahead of set . However, it still pop out another new image. Thanks again! Wenlong

Geoff Hayes 2014-5-29

编辑：Geoff Hayes 2014-5-29

Hi Wenlong - You can attach your *.m and *.fig files to any comment you add to your question. Just use the paperclip button to do so.

Wenlong 2014-5-30

Sorry! I am a rookie. I will attach the files tomorrow morning since they are in my office computer. Thanks again!

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Answer 1

Image Analyst 2014-5-29

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/131683-how-to-show-an-updating-image-generated-by-drawnow-in-gui-axes1#answer_138792

Search your code for "figure" - perhaps you're calling figure which is causing a brand new figure to be created instead of causing the image to appear in an axes control on your existing GUI figure.

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Wenlong 2014-5-29

Hi Thanks for your answer! The problem is that I am not be able to find a "figure" variable in the code. If there is a "figure" variable, I know we can handle it by using "imshow". If you can provide me an email box, I can send you my .m files. Thanks! Wenlong

Image Analyst 2014-5-30

I don't have an email address. You can attach m-files and fig files here with the paper clip icon. Or you can step through your code a line at a time to find out where the "pop out another new image window" happens exactly.

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