Flight phase reports a numpy RuntimeWarning: Mean of empty slice

[RobertPastor]

Not fully sure but in phase.py , calling FlightPhase.phaselabel() raises a Numpy RuntimeWarning when the sliced array is empty.

class FlightPhase(object):
...
def phaselabel(self, twindow=60):
...

        idxchk = idxs[mask]
        altchk = self.alt[mask]
        spdchk = self.spd[mask]
        rocchk = self.roc[mask]

        # mean value or extream value as range
        alt = max(min(np.mean(altchk), self.alt_range[-1]), self.alt_range[0])
        spd = max(min(np.mean(spdchk), self.spd_range[-1]), self.spd_range[0])
        roc = max(min(np.mean(rocchk), self.roc_range[-1]), self.roc_range[0])

Either

1. a check is performed on the sliced array and an alternative value is set
2. or a numpy configuration allows for silencing the warning ?
   Regards

[junzis]

would you mind sharing a minimum example? thx