Error message using timer

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Happy PhD
Happy PhD 2021-5-27
评论： Jan 2021-5-28
Hi,
Im having issues with my timers giving lots of error messages when being runned.
Im using the timer to plot a capture of an image from a camera to get a live stream of the camera.
I also want to plot the image profiles using a secon timer. They can use the same timer, but im not sure its possible.
Any idea what the issue is?
Im getting the following error;
The state of warning 'MATLAB:JavaEDTAutoDelegation' is 'off'.
Error while evaluating TimerFcn for timer 'timer-3'
Incorrect dimensions for matrix multiplication. Check that the number of columns in the first matrix matches the number of rows in the second matrix. To perform elementwise multiplication, use '.*'.
Error while evaluating TimerFcn for timer 'timer-3'
Incorrect dimensions for matrix multiplication. Check that the number of columns in the first matrix matches the number of rows in the second matrix. To perform elementwise multiplication, use '.*'.
Error while evaluating TimerFcn for timer 'timer-3'
Incorrect dimensions for matrix multiplication. Check that the number of columns in the first matrix matches the number of rows in the second matrix. To perform elementwise multiplication, use '.*'.
Error while evaluating TimerFcn for timer 'timer-3'
Incorrect dimensions for matrix multiplication. Check that the number of columns in the first matrix matches the number of rows in the second matrix. To perform elementwise multiplication, use '.*'.
Error while evaluating TimerFcn for timer 'timer-3'
Incorrect dimensions for matrix multiplication. Check that the number of columns in the first matrix matches the number of rows in the second matrix. To perform elementwise multiplication, use '.*'.
Error while evaluating TimerFcn for timer 'timer-3'
My timer code:
% timer for plotting camera image
function CreateImageTimer(app)
app.timerImage = timer;
app.timerImage.StartDelay=1;
%app.timerImage.busymode='queue';
app.timerImage.ExecutionMode='fixedSpacing'; % 'fixedDelay'; %
app.timerImage.Period = 0.02;
app.timerImage.TimerFcn = @(~, ~)captureImage(app);
app.timerImage.StopFcn = @(~, ~)CleanUpImageTimer(app);
end % end function
function CleanUpImageTimer(app)
try
delete(app.timerImage)
catch
disp('error cleanup timer')
end
end % end fucntion
% timer for plotting camera image
function CreatePlotTimer(app)
app.timerPlot = timer;
app.timerPlot.StartDelay=2;
%app.timerPlot.busymode='queue';
app.timerPlot.ExecutionMode='fixedSpacing'; % 'fixedDelay'; %
app.timerPlot.Period = 0.1;
app.timerPlot.TimerFcn = @(~, ~)updateImageprofile(app);
app.timerPlot.StopFcn = @(~, ~)CleanUpImageTimer(app);
end % end function
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Jan
Jan 2021-5-27
This is a compiled application. I cannot see the source code.

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回答（1 个）

Jan
Jan 2021-5-27
Incorrect dimensions for matrix multiplication. Check that the number of columns in
the first matrix matches the number of rows in the second matrix.
To perform elementwise multiplication, use '.*'.
Error while evaluating TimerFcn for timer 'timer-3'
The only matrix multiplcation I see is:
% function updateimageprofile(app,imagefile)
app.ProfileAxes_x.XTickLabel=[0:0.2:1].*XL*app.angularSize;
What is the value of app.angularSize ?
  2 个评论
Happy PhD
Happy PhD 2021-5-28
I don't know, it should just be a number. I can't check because when I run the program and try to debugg it, I get into a endless loop of timer-7 error print-outs and I can't quit it unless I terminate MATLAB via task manager. Cntrl C doesn't work to end it. I decided to start from the beginning and rewritten the code completely instead, taking mini steps and clean-write the code a bit. Hopefully i won't get the same issue. I honestly thought it was a timer issue and not the code for plotting because all that code is suppose to do is plot the intensity profiles of the object I have on the live feed of the camera. Thanks for trying to help.
Jan
Jan 2021-5-28
You can simply insert an output to check the value of the variable before the failing line:
disp(app.angularSize)

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