def error_asymptotes(pca,**kwargs):
    """
    Plots asymptotic error bounds for
    hyperbola on a stereonet.
    """
    ax = kwargs.pop("ax",current_axes())

    lon,lat = pca.plane_errors('upper', n=1000)
    ax.plot(lon,lat,'-')

    lon,lat = pca.plane_errors('lower', n=1000)
    ax.plot(lon,lat,'-')

    ax.plane(*pca.strike_dip())
Plots asymptotic error bounds for
    hyperbola on a stereonet.