def figure_asthetics(ax):
    """Change the asthetics of the given figure (operators in place).

    Parameters
    ----------
    ax : matplotlib ax object

    """

    ax.yaxis.grid()
    ax.spines['right'].set_visible(False)
    ax.spines['top'].set_visible(False)
    ax.yaxis.set_ticks_position('left')
    ax.xaxis.set_ticks_position('bottom')

    return None