#!/usr/bin/env python
# -*- coding: utf-8 -*-
# The MIT License (MIT)
# Copyright (c) 2017 Juan Cabral
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
# =============================================================================
# FUTURE
# =============================================================================
from __future__ import unicode_literals
# =============================================================================
# DOC
# =============================================================================
__doc__ = """"""
# =============================================================================
# IMPORTS
# =============================================================================
import numpy as np
from .core import Extractor
# =============================================================================
# EXTRACTOR CLASS
# =============================================================================
[docs]class Q31(Extractor):
r"""
**Q31** (:math:`Q_{3-1}`)
:math:`Q_{3-1}` is the difference between the third quartile, :math:`Q_3`,
and the first quartile, :math:`Q_1`, of a raw light curve.
:math:`Q_1` is a split between the lowest 25% and the highest 75% of data.
:math:`Q_3` is a split between the lowest 75% and the highest 25% of data.
.. code-block:: pycon
>>> fs = feets.FeatureSpace(only=['Q31'])
>>> features, values = fs.extract(**lc_normal)
>>> dict(zip(features, values))
{'Q31': 1.3320376563134508}
References
----------
.. [kim2014epoch] Kim, D. W., Protopapas, P., Bailer-Jones, C. A.,
Byun, Y. I., Chang, S. W., Marquette, J. B., & Shin, M. S. (2014).
The EPOCH Project: I. Periodic Variable Stars in the EROS-2 LMC
Database. arXiv preprint Doi:10.1051/0004-6361/201323252.
"""
data = ['magnitude']
features = ["Q31"]
[docs] def fit(self, magnitude):
q31 = np.percentile(magnitude, 75) - np.percentile(magnitude, 25)
return {"Q31": q31}
[docs]class Q31Color(Extractor):
r"""
**Q31_color** (:math:`Q_{3-1|B-R}`)
:math:`Q_{3-1}` applied to the difference between both bands of a light
curve (B-R).
.. code-block:: pycon
>>> fs = feets.FeatureSpace(only=['Q31_color'])
>>> features, values = fs.extract(**lc_normal)
>>> dict(zip(features, values))
{'Q31_color': 1.8840489594535512}
References
----------
.. [kim2014epoch] Kim, D. W., Protopapas, P., Bailer-Jones, C. A.,
Byun, Y. I., Chang, S. W., Marquette, J. B., & Shin, M. S. (2014).
The EPOCH Project: I. Periodic Variable Stars in the EROS-2 LMC
Database. arXiv preprint Doi:10.1051/0004-6361/201323252.
"""
data = ['aligned_magnitude', 'aligned_magnitude2']
features = ["Q31_color"]
[docs] def fit(self, aligned_magnitude, aligned_magnitude2):
N = len(aligned_magnitude)
b_r = aligned_magnitude[:N] - aligned_magnitude2[:N]
q31_color = np.percentile(b_r, 75) - np.percentile(b_r, 25)
return {"Q31_color": q31_color}
