Subtract 1 from variable each second

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Martin
Martin el 10 de Jun. de 2021
Comentada: Jan el 10 de Jun. de 2021
Imagine I got something like this:
counter = 100;
while true
do_something=true;
pause(rand);
disp(counter);
end
Then I need the counter variable to get subtracted by 1 each second inside the while loop. Any suggestions?

Respuesta aceptada

Jan
Jan el 10 de Jun. de 2021
counter = 100;
TimerH = timer('TimerFcn', @doCount, 'ExecutionMode', 'fixedRate', ...
'Period', 1.0, 'UserData', counter);
start(TimerH);
while true
do_something=true;
pause(rand);
counter = TimerH.UserData;
disp(counter);
end
delete(TimerH);
function doCount(TimerH, EventData)
TimerH.UserData = TimerH.UserData - 1;
end
Do you really need an active counter?
iniTime = clock;
while true
do_something=true;
pause(rand);
counter = 100 - etime(clock, iniTime);
disp(counter);
end
  3 comentarios
Martin
Martin el 10 de Jun. de 2021
me2, thanks!
Jan
Jan el 10 de Jun. de 2021
@Mathieu NOE: And it even counts backwards from 100 for 3 weeks. :-)

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Más respuestas (1)

Mathieu NOE
Mathieu NOE el 10 de Jun. de 2021
hi
nothing fancy
counter = 100;
while true
do_something=true;
counter = counter -1; % decrement counter
pause(1); % 1 second pause
disp(counter);
end
  3 comentarios
Mathieu NOE
Mathieu NOE el 10 de Jun. de 2021
so how do you plan to get the counter decremented every second ??
Martin
Martin el 10 de Jun. de 2021
Editada: Martin el 10 de Jun. de 2021
yeah thats my question :) I guess I need to use
now
(before the loop) and also indside the loop, but I have hard times figure it out which is why I am asking

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