code: def plot_trajectories(T, colors=None, fig='current', ax=None, colorbar=False,
                        cmap=None, alpha=1, linewidth=1, title=None):
    '''Plot lines in T as trajectories (2d only).'''
    ax = _get_axis(fig, ax, False)
    if colors is not None:
      colors = np.asanyarray(colors)
    lc = LineCollection(T, array=colors, cmap=cmap, alpha=alpha,
                        linewidth=linewidth)
    ax.add_collection(lc, autolim=True)
    if colors is not None and colorbar:
      cbar = ax.figure.colorbar(lc)
      cbar.set_alpha(1.)  # colorbars with alpha are ugly
      cbar.draw_all()
    ax.autoscale_view()
    if title:
      ax.set_title(title)
    return plt.shof plot_trajectories(T, colors=None, fig='current', ax=None, colorbar=False,
                        cmap=None, alpha=1, linewidth=1, title=None):
    '''Plot lines in T as trajectories (2d only).'''
    ax = _get_axis(fig, ax, False)
    if colors is not None:
      colors = np.asanyarray(colors)
    lc = LineCollection(T, array=colors, cmap=cmap, alpha=alpha,
                        linewidth=linewidth)
    ax.add_collection(lc, autolim=True)
    if colors is not None and colorbar:
      cbar = ax.figure.colorbar(lc)
      cbar.set_alpha(1.)  # colorbars with alpha are ugly
      cbar.draw_all()
    ax.autoscale_view()
    if title:
      ax.set_title(title)
    return plt.show
docs: Plot lines in T as trajectories (2d only).