def plot_bar(ax, value, label):
    """
    Display a bar chart into the current ax plot.

    Parameters
    ----------
    ax: plt.axes.Axes
        Axe where to put the plot
    value: list or number
        Values list (same size than `label`)
    label: list or str
        Labels list (same size than `value`)
    """
    rects = ax.bar(label, value)
    for r in rects:
        h, w, x, y = r.get_height(), r.get_width(), r.get_x(), r.get_y()
        ax.annotate(str(round(h, 3)), xy=(x + w / 2, y + h / 2), xytext=(0,
            0), textcoords='offset points', fontsize=16, ha='center', va=
            'center', color='white', weight='bold', clip_on=True)
