rqt_plot did not work

edit

When I was learning beginner level tutorial, 6. Understanding ROS Topics with ROS kinetic on Ubuntu, no new window appeared after running

rosrun rqt_plot rqt_plot

and the error info is:

/usr/lib/python2.7/dist-packages/matplotlib/axis.py:1015: UserWarning: Unable to find pixel distance along axis for interval padding of ticks; assuming no interval padding needed.
  warnings.warn("Unable to find pixel distance along axis "
/usr/lib/python2.7/dist-packages/matplotlib/axis.py:1025: UserWarning: Unable to find pixel distance along axis for interval padding of ticks; assuming no interval padding needed.
  warnings.warn("Unable to find pixel distance along axis "
Traceback (most recent call last):
  File "/opt/ros/kinetic/lib/python2.7/dist-packages/rqt_plot/data_plot/mat_data_plot.py", line 107, in resizeEvent
    self.figure.tight_layout()
  File "/usr/lib/python2.7/dist-packages/matplotlib/figure.py", line 1754, in tight_layout
    rect=rect)
  File "/usr/lib/python2.7/dist-packages/matplotlib/tight_layout.py", line 349, in get_tight_layout_figure
    pad=pad, h_pad=h_pad, w_pad=w_pad)
  File "/usr/lib/python2.7/dist-packages/matplotlib/tight_layout.py", line 128, in auto_adjust_subplotpars
    fig.transFigure.inverted())
  File "/usr/lib/python2.7/dist-packages/matplotlib/transforms.py", line 1775, in inverted
    self._inverted = Affine2D(inv(mtx), shorthand_name=shorthand_name)
  File "/usr/lib/python2.7/dist-packages/numpy/linalg/linalg.py", line 526, in inv
    ainv = _umath_linalg.inv(a, signature=signature, extobj=extobj)
  File "/usr/lib/python2.7/dist-packages/numpy/linalg/linalg.py", line 90, in _raise_linalgerror_singular
    raise LinAlgError("Singular matrix")
numpy.linalg.linalg.LinAlgError: Singular matrix