# spacepy.plot.utils.shared_ylabel

`spacepy.plot.utils.``shared_ylabel`(axes, txt, *args, **kwargs)

  Create a ylabel that spans several subplots

  Useful for a multi-panel plot where several subplots have the same units/quantities on the y axis.

  Parameters
    axes list

      The `Axes` objects (i.e. subplots) which should share a single label

    txt str

      The label to place in the middle of all the axes objects.

  Returns
    out matplotlib.text.Text

      The `Text` object for the label.

  Other Parameters
    Additional arguments and keywords are passed through to
    :meth:`~matplotlib.axes.Axes.set_ylabel`

  Notes

  This function can be fairly fragile and should only be used for fairly simple layouts, e.g., a one-column multi-row plot stack.

  The label is associated with the bottommost subplot in `axes`.

  Examples

      >>> import spacepy.plot.utils
      >>> import matplotlib.pyplot as plt
      >>> fig = plt.figure()
      >>> #Make three stacked subplots
      >>> ax0 = fig.add_subplot(311)
      >>> ax1 = fig.add_subplot(312)
      >>> ax2 = fig.add_subplot(313)
      >>> ax0.plot([1, 2, 3], [1, 2, 1]) #just make some lines
      [<matplotlib.lines.Line2D object at 0x0000000>]
      >>> ax1.plot([1, 2, 3], [1, 2, 1])
      [<matplotlib.lines.Line2D object at 0x0000000>]
      >>> ax2.plot([1, 2, 3], [1, 2, 1])
      [<matplotlib.lines.Line2D object at 0x0000000>]
      >>> #Create a green label across all three axes
      >>> spacepy.plot.utils.shared_ylabel([ax0, ax1, ax2],
      ... 'this is a very long label that spans all three axes', color='g')