TimePlotDate

class astropy.time.TimePlotDate(val1, val2, scale, precision, in_subfmt, out_subfmt, from_jd=False)

Bases: astropy.time.TimeFromEpoch

Matplotlib plot_date input: 1 + number of days from 0001-01-01 00:00:00 UTC

This can be used directly in the matplotlib plot_date function:

>>> import matplotlib.pyplot as plt
>>> jyear = np.linspace(2000, 2001, 20)
>>> t = Time(jyear, format='jyear', scale='utc')
>>> plt.plot_date(t.plot_date, jyear)
>>> plt.gcf().autofmt_xdate()  # orient date labels at a slant
>>> plt.draw()

For example, 730120.0003703703 is midnight on January 1, 2000.

Attributes Summary

cache	Return the cache associated with this instance.
epoch_format
epoch_scale
epoch_val
epoch_val2
jd1
jd2
jd2_filled
mask
masked
name
scale	Time scale
subfmts
unit
value

Methods Summary

mask_if_needed(value)
set_jds(val1, val2)	Initialize the internal jd1 and jd2 attributes given val1 and val2.
to_value([parent])	Return time representation from internal jd1 and jd2.

Attributes Documentation

cache

Return the cache associated with this instance.

epoch_format = 'jd'

epoch_scale = 'utc'

epoch_val = 1721424.5

epoch_val2 = None

jd1

jd2

jd2_filled

mask

masked

name = 'plot_date'

scale

Time scale

subfmts = (('float', <class 'numpy.float64'>, None, <ufunc 'add'>), ('long', <class 'numpy.float128'>, <function longdouble_to_twoval>, <function twoval_to_longdouble>), ('decimal', <class 'numpy.object_'>, <numpy.vectorize object>, <numpy.vectorize object>), ('str', <class 'numpy.str_'>, <numpy.vectorize object>, <numpy.vectorize object>), ('bytes', <class 'numpy.bytes_'>, <numpy.vectorize object>, <numpy.vectorize object>))

unit = 1.0

value

Methods Documentation

mask_if_needed(value)

set_jds(val1, val2)

Initialize the internal jd1 and jd2 attributes given val1 and val2. For an TimeFromEpoch subclass like TimeUnix these will be floats giving the effective seconds since an epoch time (e.g. 1970-01-01 00:00:00).

to_value(parent=None, **kwargs)

Return time representation from internal jd1 and jd2. Subclasses that require parent or to adjust the jds should override this method.