Set Joystick position using psychtoolbox

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I am running an experiment involving a joystick (cannot use a mouse for technical reasons), using psychtoolbox version 3, on a linux computer. At discrete time-points in the experiment, I need to place the joystick cursor at pre-determined points on the screen, so that the participant can move the cursor from there. However, psychtoolbox does not seem to have a command to do this. I can get this to work using a mouse, but not with a joystick. I tried the SetMouse command, but it does not seem to work for the joystick cursor. Does someone have any idea?

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