def absdeg(deg):
    """Change from signed degrees to 0-180 or 0-360 ranges

    deg: ndarray
        Movement data in pitch, roll, yaw (degrees)

    Returns
    -------
    deg_abs: ndarray
        Movement translated from -180:180/-90:90 degrees to 0:360/0:180 degrees

    Example
    -------
    deg = numpy.array([-170, -120, 0, 90])
    absdeg(deg) # returns array([190, 240,   0,  90])
    """
    import numpy
    d = numpy.copy(deg)
    if numpy.max(numpy.abs(deg)) > 90.0:
        d[deg < 0] = 360 + deg[deg < 0]
    else:
        d[deg < 0] = 180 + deg[deg < 0]
    return d
