How can I limit input into the command window?

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Femke R 2022-3-25

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https://ww2.mathworks.cn/matlabcentral/answers/1680584-how-can-i-limit-input-into-the-command-window

评论： Star Strider 2022-3-25

I have written an experiment where once in a while I have to input some numbers (1 and 2) into the command window to make the experiment continue. I am currently doing this using the input() function. However, the participant also has access to an instrument which writes letters to matlab. I want to limit the characters I can write into the command window to only include the numbers, so that the instrument doesn't interfere with my input. Checking for the right input after its been given will not work, as the instrument can continuiously send letters, making it impossible for me to write in just my numbers.

I currently have these lines of code, where I manually input whether I want to continue or abort after each block of trials, after which my input is evaluated.

    while 1
            cont=input(sprintf("do you want to continue with block %g?  (1 for yes, 2 for no and abort):    ",wrun));
            %%% if you want to continue, go to next iteration (end while loop)
            if cont ==1
                break
                %%% if you want to abort, make stop variable (end while loop)
            elseif cont ==2
                stop=1;
                break
            end