R. David Murray added the comment:
Numpy is not part of the python standard library. You should report this issue
to the numpy bug tracker, which appears to be here:
https://github.com/numpy/numpy/issues. Or perhaps first ask the numpy
community if this is really a bug: the new version might
New submission from Amy:
I just updated to numpy 1.12.1 and am getting this Runtime Warning when using
numpy.minimum or numpy.maximum:
RuntimeWarning: invalid value encountered in maximum
Prior to updating, I was using numpy 1.10.x and had no issues running
numpy.minimum or numpy.maximum
---
