def _dim(time, t0):
if len(time):
t0 = _mds.Int64(t0)
time = _mds.Int64Array(time)
if t0 == 0:
unit = 'ns'
else:
time = _mds.Float64(time - t0) * 1E-9
unit = 's'
wind = _mds.Window(time[0], time[time.shape[0] - 1], t0)
dim = _mds.Dimension(wind, time)
dim.setUnits(unit)
return dim
else:
return _mds.EmptyData()
