Question

I have a loop in which I keep entering points into figure using ginput. I would like the loop to run until user presses a key, Heres what I have:

function enter_points()
    f = figure();
    axis([-1 1 -1 1]);

    coorX = [];
    coorY = [];

    while 1
        [x, y] = ginput(1);
        coorX = [coorX x];
        coorY = [coorY y];

        waitforbuttonpress;
        key = get(f,'CurrentCharacter');
        if (key == 'e')
            display('End of cycle.')
            break;
        else
            display('Enter next point')
        end
    end

    coor = [transpose(coorX) transpose(coorY)];
    display(size(coor));
    display(coor);
end

The problem with this code is, that I haveto press a key to continue entering points. Another problem is, that Matlab sometimes freezes when running this code (Im not sure it the code is the reason or something else is). And how to detect pressing “enter” instead of “e”? Thanks for any help

Answer 1

Why don’t you use the builtin:

[X,Y] = ginput gathers an unlimited number of points until the return
key is pressed.