detection of key press when plotting in matlab












1














I would like to detect pressing of key when plotting position of pendulum and getting position of pendulum to variable, when the key is being pressed. I have no idea how to do it, I tried to search, but I have not found anything helpful. I tried to use WindowKeyPressFcn callback, but I cannot find a way to use it. I tried this way:



function keyPressCallback(source,eventdata)
keyPressed = eventdata.Key;
if strcmpi(keyPressed,'space')
disp('success');
end
end

set(f,'WindowKeyPressFcn',@keyPressCallback);


But I get an error when running the script:




There is no WindowKeyPressFcn property on the Root class.











share|improve this question
























  • Please add some of your code and attempts.
    – Alex_P
    Nov 12 at 18:55










  • I added the code.
    – BlackHawk3
    Nov 12 at 19:01






  • 1




    Is f a figure handle?
    – Navan
    Nov 12 at 19:03






  • 1




    It seems that f is zero in your code? Try passing the handle of the figure where you do the plotting.
    – Cris Luengo
    Nov 13 at 2:31
















1














I would like to detect pressing of key when plotting position of pendulum and getting position of pendulum to variable, when the key is being pressed. I have no idea how to do it, I tried to search, but I have not found anything helpful. I tried to use WindowKeyPressFcn callback, but I cannot find a way to use it. I tried this way:



function keyPressCallback(source,eventdata)
keyPressed = eventdata.Key;
if strcmpi(keyPressed,'space')
disp('success');
end
end

set(f,'WindowKeyPressFcn',@keyPressCallback);


But I get an error when running the script:




There is no WindowKeyPressFcn property on the Root class.











share|improve this question
























  • Please add some of your code and attempts.
    – Alex_P
    Nov 12 at 18:55










  • I added the code.
    – BlackHawk3
    Nov 12 at 19:01






  • 1




    Is f a figure handle?
    – Navan
    Nov 12 at 19:03






  • 1




    It seems that f is zero in your code? Try passing the handle of the figure where you do the plotting.
    – Cris Luengo
    Nov 13 at 2:31














1












1








1







I would like to detect pressing of key when plotting position of pendulum and getting position of pendulum to variable, when the key is being pressed. I have no idea how to do it, I tried to search, but I have not found anything helpful. I tried to use WindowKeyPressFcn callback, but I cannot find a way to use it. I tried this way:



function keyPressCallback(source,eventdata)
keyPressed = eventdata.Key;
if strcmpi(keyPressed,'space')
disp('success');
end
end

set(f,'WindowKeyPressFcn',@keyPressCallback);


But I get an error when running the script:




There is no WindowKeyPressFcn property on the Root class.











share|improve this question















I would like to detect pressing of key when plotting position of pendulum and getting position of pendulum to variable, when the key is being pressed. I have no idea how to do it, I tried to search, but I have not found anything helpful. I tried to use WindowKeyPressFcn callback, but I cannot find a way to use it. I tried this way:



function keyPressCallback(source,eventdata)
keyPressed = eventdata.Key;
if strcmpi(keyPressed,'space')
disp('success');
end
end

set(f,'WindowKeyPressFcn',@keyPressCallback);


But I get an error when running the script:




There is no WindowKeyPressFcn property on the Root class.








matlab






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 12 at 23:58









aduguid

2,12661031




2,12661031










asked Nov 12 at 18:50









BlackHawk3

364




364












  • Please add some of your code and attempts.
    – Alex_P
    Nov 12 at 18:55










  • I added the code.
    – BlackHawk3
    Nov 12 at 19:01






  • 1




    Is f a figure handle?
    – Navan
    Nov 12 at 19:03






  • 1




    It seems that f is zero in your code? Try passing the handle of the figure where you do the plotting.
    – Cris Luengo
    Nov 13 at 2:31


















  • Please add some of your code and attempts.
    – Alex_P
    Nov 12 at 18:55










  • I added the code.
    – BlackHawk3
    Nov 12 at 19:01






  • 1




    Is f a figure handle?
    – Navan
    Nov 12 at 19:03






  • 1




    It seems that f is zero in your code? Try passing the handle of the figure where you do the plotting.
    – Cris Luengo
    Nov 13 at 2:31
















Please add some of your code and attempts.
– Alex_P
Nov 12 at 18:55




Please add some of your code and attempts.
– Alex_P
Nov 12 at 18:55












I added the code.
– BlackHawk3
Nov 12 at 19:01




I added the code.
– BlackHawk3
Nov 12 at 19:01




1




1




Is f a figure handle?
– Navan
Nov 12 at 19:03




Is f a figure handle?
– Navan
Nov 12 at 19:03




1




1




It seems that f is zero in your code? Try passing the handle of the figure where you do the plotting.
– Cris Luengo
Nov 13 at 2:31




It seems that f is zero in your code? Try passing the handle of the figure where you do the plotting.
– Cris Luengo
Nov 13 at 2:31












1 Answer
1






active

oldest

votes


















2














following Navan's and Cris Luengo's comments, I rearranged the script and it runs successfully for me



f = figure;
set(f,'WindowKeyPressFcn',@keyPressCallback);
plot(rand(10,2))
function keyPressCallback(source,eventdata)
keyPressed = eventdata.Key;
if strcmpi(keyPressed,'space')
disp('success');
end
end





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    1 Answer
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    active

    oldest

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    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    2














    following Navan's and Cris Luengo's comments, I rearranged the script and it runs successfully for me



    f = figure;
    set(f,'WindowKeyPressFcn',@keyPressCallback);
    plot(rand(10,2))
    function keyPressCallback(source,eventdata)
    keyPressed = eventdata.Key;
    if strcmpi(keyPressed,'space')
    disp('success');
    end
    end





    share|improve this answer


























      2














      following Navan's and Cris Luengo's comments, I rearranged the script and it runs successfully for me



      f = figure;
      set(f,'WindowKeyPressFcn',@keyPressCallback);
      plot(rand(10,2))
      function keyPressCallback(source,eventdata)
      keyPressed = eventdata.Key;
      if strcmpi(keyPressed,'space')
      disp('success');
      end
      end





      share|improve this answer
























        2












        2








        2






        following Navan's and Cris Luengo's comments, I rearranged the script and it runs successfully for me



        f = figure;
        set(f,'WindowKeyPressFcn',@keyPressCallback);
        plot(rand(10,2))
        function keyPressCallback(source,eventdata)
        keyPressed = eventdata.Key;
        if strcmpi(keyPressed,'space')
        disp('success');
        end
        end





        share|improve this answer












        following Navan's and Cris Luengo's comments, I rearranged the script and it runs successfully for me



        f = figure;
        set(f,'WindowKeyPressFcn',@keyPressCallback);
        plot(rand(10,2))
        function keyPressCallback(source,eventdata)
        keyPressed = eventdata.Key;
        if strcmpi(keyPressed,'space')
        disp('success');
        end
        end






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Nov 13 at 10:15









        Yuval Harpaz

        55728




        55728






























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