rqt_plot的問題（kinetic）

1.1 問題

運行：rqt_plot

rosrun rqt_plot rqt_plot

ggk@ggk-virtual-machine:~$ rosrun rqt_plot rqt_plot
/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