How do I make my program KEEP doing a command at a certain condition?

Hi,

I was wondering how I could make my program do an action at a certain condition for a certain amount of time. For example, how do I make it so if Val is less or equal to 20, action 1 keeps getting done for a certain amount of time. In this case until Val is 30. I am a beginner at this so my apologies if this sounds confusing.

Thanks!

if Val <= 20
    %action1
    while Val == 30
    %action2
    end
else
    %action3
end 

Answer 1

[Yongjian Feng]

Try this:

if Val <= 20
    max_time = 120; % assume do it for at most 2 mins=120secs
    wait_time = 10; % wait for 10 sec. So at most 120/10=12 times
    for i=1:max_time/wait_time
        % do your action 1
        % now you need to update Val
        if Val > 20
            % done
            break;
        end
        pause(wait_time); % wait for sometime
    end
    
    % When you are here, either Val is > 20 or you run 12 times already but
    % Val is still smaller than 20. What do you want here?
else
    %action3
end