set_useOffset raised an error (matplotlib version issue?), use rcParams
set_useOffset raised an error (matplotlib version issue?), use rcParams

At top setting
plt.rcParams['axes.formatter.useoffset'] = False

instead of calling
ax.get_xaxis().get_major_formatter().set_useOffset(False)

This means fewer lines of code, but should be more resilient to
matplotlib versions that don't support this API.


Former-commit-id: df5e05a415d2b3bb1c215bcddc55d2cbf2523c3d
UCBerkeleySETI/blimpy,UCBerkeleySETI/blimpy