Subtract 1 from variable each second
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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?
采纳的回答
Jan
2021-6-10
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 个评论
Mathieu NOE
2021-6-10
Whow
I'm impressed !
so much science for a counter !
Martin
2021-6-10
Jan
2021-6-10
@Mathieu NOE: And it even counts backwards from 100 for 3 weeks. :-)
更多回答（1 个）
Mathieu NOE
2021-6-10
hi
nothing fancy
counter = 100;
while true
do_something=true;
counter = counter -1; % decrement counter
pause(1); % 1 second pause
disp(counter);
end
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