Why is my code not working?

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Emily Smith 2016-10-21

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评论： Emily Smith 2016-10-21

I have the following code that allows me to increase/decrease the value of d by pressing the arrow keys.

    d = 20
    f = figure;
    k=1;
    while k
        waitforbuttonpress;
        if get(gcf,'CurrentCharacter')==28 %for left arrow key
            d=d-10
        elseif get(gcf,'CurrentCharacter')==29 %for right arrow key
            d=d+10
        elseif get(gcf,'CurrentCharacter')==32 %for space bar
            break
        end
    end

It almost works, except I would like the loop to end or "break" when I press the space bar. For some reason when I try pressing the spacebar MatLab returns with "There is no CurrentCharacter property on the Figure class". I tried a slightly different code by changing "break" in the 11th line to "k=0" but I got the exact same error.

Thank you!!!