95 lines
2.9 KiB
Python
95 lines
2.9 KiB
Python
|
"""EpochConverter module containing class EpochConverter."""
|
||
|
|
|
||
|
|
from matplotlib import cbook, units
|
||
|
|
import matplotlib.dates as date_ticker
|
||
|
|
|
||
|
|
__all__ = ['EpochConverter']
|
||
|
|
|
||
|
|
|
||
|
|
class EpochConverter(units.ConversionInterface):
|
||
|
|
"""
|
||
|
|
Provides Matplotlib conversion functionality for Monte Epoch and Duration
|
||
|
|
classes.
|
||
|
|
"""
|
||
|
|
|
||
|
|
jdRef = 1721425.5
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def axisinfo(unit, axis):
|
||
|
|
# docstring inherited
|
||
|
|
majloc = date_ticker.AutoDateLocator()
|
||
|
|
majfmt = date_ticker.AutoDateFormatter(majloc)
|
||
|
|
return units.AxisInfo(majloc=majloc, majfmt=majfmt, label=unit)
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def float2epoch(value, unit):
|
||
|
|
"""
|
||
|
|
Convert a Matplotlib floating-point date into an Epoch of the specified
|
||
|
|
units.
|
||
|
|
|
||
|
|
= INPUT VARIABLES
|
||
|
|
- value The Matplotlib floating-point date.
|
||
|
|
- unit The unit system to use for the Epoch.
|
||
|
|
|
||
|
|
= RETURN VALUE
|
||
|
|
- Returns the value converted to an Epoch in the specified time system.
|
||
|
|
"""
|
||
|
|
# Delay-load due to circular dependencies.
|
||
|
|
import matplotlib.testing.jpl_units as U
|
||
|
|
|
||
|
|
secPastRef = value * 86400.0 * U.UnitDbl(1.0, 'sec')
|
||
|
|
return U.Epoch(unit, secPastRef, EpochConverter.jdRef)
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def epoch2float(value, unit):
|
||
|
|
"""
|
||
|
|
Convert an Epoch value to a float suitable for plotting as a python
|
||
|
|
datetime object.
|
||
|
|
|
||
|
|
= INPUT VARIABLES
|
||
|
|
- value An Epoch or list of Epochs that need to be converted.
|
||
|
|
- unit The units to use for an axis with Epoch data.
|
||
|
|
|
||
|
|
= RETURN VALUE
|
||
|
|
- Returns the value parameter converted to floats.
|
||
|
|
"""
|
||
|
|
return value.julianDate(unit) - EpochConverter.jdRef
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def duration2float(value):
|
||
|
|
"""
|
||
|
|
Convert a Duration value to a float suitable for plotting as a python
|
||
|
|
datetime object.
|
||
|
|
|
||
|
|
= INPUT VARIABLES
|
||
|
|
- value A Duration or list of Durations that need to be converted.
|
||
|
|
|
||
|
|
= RETURN VALUE
|
||
|
|
- Returns the value parameter converted to floats.
|
||
|
|
"""
|
||
|
|
return value.seconds() / 86400.0
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def convert(value, unit, axis):
|
||
|
|
# docstring inherited
|
||
|
|
|
||
|
|
# Delay-load due to circular dependencies.
|
||
|
|
import matplotlib.testing.jpl_units as U
|
||
|
|
|
||
|
|
if not cbook.is_scalar_or_string(value):
|
||
|
|
return [EpochConverter.convert(x, unit, axis) for x in value]
|
||
|
|
if unit is None:
|
||
|
|
unit = EpochConverter.default_units(value, axis)
|
||
|
|
if isinstance(value, U.Duration):
|
||
|
|
return EpochConverter.duration2float(value)
|
||
|
|
else:
|
||
|
|
return EpochConverter.epoch2float(value, unit)
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def default_units(value, axis):
|
||
|
|
# docstring inherited
|
||
|
|
if cbook.is_scalar_or_string(value):
|
||
|
|
return value.frame()
|
||
|
|
else:
|
||
|
|
return EpochConverter.default_units(value[0], axis)
|