Updating Image within axes on GUI

Hi, I have a live video feed in axes1. I'm trying to crop a box from present frame each 1ms and put it in axes 2 so axis two is simulating showing a video of the cropped area. A timer is supposed to control the update. For some reason, after the first iteration of the timer function, it gives an error:

< Error while evaluating TimerFcn for timer 'timer-1'

Reference to non-existent field 'axes2'. >

My timer updating function is

function user_timer_update(src,evt, fig_handle,vid)
global gy;
Rec_Size = [640,360,1000,1000];
handles = guihandles(fig_handle);
axes(handles.axes2);
J = getsnapshot(vid);
J = imcrop(J,Rec_Size);
imshow(J,'Parent',handles.axes2);
gy = gy + 1;
disp(gy);

Please how do I rectify this?? Thanks for the help. I already tried changing the "NextPlot" value to "replace children" and it works but it drastically slows down the live feed in the first axes.

Answer 1

[Image Analyst]

You need to place an axes control on your figure called axes2. Because it's missing, that seems to be the problem.

[Kosidinma]

how would i do this please?

[Image Analyst]

View this: http://blogs.mathworks.com/videos/category/gui-or-guide/

[Kosidinma]

thanks