def drawCutoffVert(ax,x,cl="r",lb="",ls="--",lw=.5):
    """
    This method draws a vertical cutoff line or lines
    :Arguments:

        :type ax: matplotlib axis
        :param ax: axis to draw lines on

        :type x: int/float or list of ints/floats
        :param x: x value(s) on which to draw cutoff lines

        :type cl: string
        :param cl: color. default is red

        :type lb: string
        :param lb: optional label for legend

        :type ls: string
        :param ls: optional linestyle defaults to solid line

        :type lw: int
        :param lw: optional line width

    :Return:
        :type ax: matplotlib axis
        :param ax: axis with cutoffs
    """
    oldLims = ax.get_ylim()
    ax.vlines(x,ymin=ax.get_ylim()[0],ymax=ax.get_ylim()[1],color='r',label=lb,linestyle=ls,linewidth=lw)
    ax.set_ylim(oldLims)
    return ax