def plot_errorbar3():
    with book_format.figsize(y=1.5):
        book_plots.plot_errorbars([(160, 1, 'A'), (170, 9, 'B')], 
                                  xlims=(145, 185), ylims=(-1, 2))
def plot_errorbar1():
    with book_format.figsize(y=1.5):
        book_plots.plot_errorbars([(160, 8, 'A'), (170, 8, 'B')],
                                  xlims=(145, 185))
def plot_errorbar3():
    with book_format.figsize(y=1.5):
        book_plots.plot_errorbars([(160, 1, 'A'), (170, 9, 'B')],
                                  xlims=(145, 185),
                                  ylims=(-1, 2))
def plot_errorbar1():
    with book_format.figsize(y=1.5):
        book_plots.plot_errorbars([(160, 8, 'A'), (170, 8, 'B')],
                                   xlims=(145, 185))