import numpy as np
from traitlets import Bool, Unicode, observe
from jdaviz.core.custom_traitlets import FloatHandleEmpty, IntHandleEmpty
from jdaviz.core.events import ViewerAddedMessage
from jdaviz.core.registries import tray_registry
from jdaviz.core.template_mixin import (PluginTemplateMixin,
DatasetSelectMixin,
AutoTextField,
skip_if_no_updates_since_last_active,
with_spinner, with_temp_disable)
from jdaviz.core.user_api import PluginUserApi
from lcviz.components import FluxColumnSelectMixin
from lcviz.marks import LivePreviewTrend, LivePreviewFlattened
from lcviz.utils import data_not_folded, is_not_tpf
from lcviz.viewers import TimeScatterView, PhaseScatterView
from lcviz.parsers import _data_with_reftime
__all__ = ['Flatten']
[docs]
@tray_registry('flatten', label="Flatten")
class Flatten(PluginTemplateMixin, FluxColumnSelectMixin, DatasetSelectMixin):
"""
See the :ref:`Flatten Plugin Documentation <flatten>` for more details.
Only the following attributes and methods are available through the
:ref:`public plugin API <plugin-apis>`:
* :meth:`~jdaviz.core.template_mixin.PluginTemplateMixin.show`
* :meth:`~jdaviz.core.template_mixin.PluginTemplateMixin.open_in_tray`
* :meth:`~jdaviz.core.template_mixin.PluginTemplateMixin.close_in_tray`
* ``show_live_preview`` : bool
Whether to show the live-preview of the (unnormalized) flattened light curve
* ``show_trend_preview`` : bool
Whether to show the live-preview of the trend curve used to flatten the light curve
* ``dataset`` (:class:`~jdaviz.core.template_mixin.DatasetSelect`):
Dataset to flatten.
* ``window_length`` : int
* ``polyorder`` : int
* ``break_tolerance`` : int
* ``niters`` : int
* ``sigma`` : float
* ``unnormalize`` : bool
* ``flux_label`` (:class:`~jdaviz.core.template_mixin.AutoTextField`):
Label for the resulting flux column added to ``dataset`` and automatically selected as the new
flux column (origin).
* :meth:`flatten`
"""
template_file = __file__, "flatten.vue"
uses_active_status = Bool(True).tag(sync=True)
show_live_preview = Bool(True).tag(sync=True)
show_trend_preview = Bool(True).tag(sync=True)
flatten_err = Unicode().tag(sync=True)
window_length = IntHandleEmpty(101).tag(sync=True)
polyorder = IntHandleEmpty(2).tag(sync=True)
break_tolerance = IntHandleEmpty(5).tag(sync=True)
niters = IntHandleEmpty(3).tag(sync=True)
sigma = FloatHandleEmpty(3).tag(sync=True)
unnormalize = Bool(False).tag(sync=True)
flux_label_label = Unicode().tag(sync=True)
flux_label_default = Unicode().tag(sync=True)
flux_label_auto = Bool(True).tag(sync=True)
flux_label_invalid_msg = Unicode('').tag(sync=True)
flux_label_overwrite = Bool(False).tag(sync=True)
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.flux_label = AutoTextField(self, 'flux_label_label',
'flux_label_default', 'flux_label_auto',
'flux_label_invalid_msg')
# do not support flattening data in phase-space
# do not allow TPF as input
self.dataset.add_filter(data_not_folded, is_not_tpf)
# marks do not exist for the new viewer, so force another update to compute and draw
# those marks
self.hub.subscribe(self, ViewerAddedMessage, handler=lambda _: self._live_update())
self._set_default_label()
@property
def user_api(self):
expose = ['show_live_preview', 'show_trend_preview',
'dataset',
'window_length', 'polyorder', 'break_tolerance',
'niters', 'sigma', 'unnormalize', 'flux_label', 'flatten']
return PluginUserApi(self, expose=expose)
@property
def marks(self):
trend_marks = {}
flattened_marks = {}
for viewer in self.app._viewer_store.values():
needs_trend = isinstance(viewer, TimeScatterView) and not isinstance(viewer, PhaseScatterView) # noqa
needs_flattened = isinstance(viewer, (TimeScatterView, PhaseScatterView))
for mark in viewer.figure.marks:
if isinstance(mark, LivePreviewTrend):
trend_marks[viewer.reference] = mark
needs_trend = False
elif isinstance(mark, LivePreviewFlattened):
flattened_marks[viewer.reference] = mark
needs_flattened = False
if not needs_trend and not needs_flattened:
break
if needs_trend:
mark = LivePreviewTrend(viewer, visible=self.is_active)
viewer.figure.marks = viewer.figure.marks + [mark]
trend_marks[viewer.reference] = mark
if needs_flattened:
mark = LivePreviewFlattened(viewer, visible=self.is_active)
viewer.figure.marks = viewer.figure.marks + [mark]
flattened_marks[viewer.reference] = mark
return trend_marks, flattened_marks
@observe('dataset_selected', 'flux_column_selected')
def _set_default_label(self, event={}):
'''Generate a label and set the results field to that value'''
if not hasattr(self, 'dataset'): # pragma: no cover
return
# TODO: have an option to create new data entry and drop other columns?
# (or should that just go through future data cloning)
self.flux_label.default = f"{self.flux_column_selected}_flattened"
@observe('flux_label_label', 'dataset')
def _update_label_valid(self, event={}):
if self.flux_label.value in self.flux_column.choices:
self.flux_label.invalid_msg = ''
self.flux_label_overwrite = True
elif self.flux_label.value in getattr(self.dataset.selected_obj, 'columns', []):
self.flux_label.invalid_msg = 'name already in use'
else:
self.flux_label.invalid_msg = ''
self.flux_label_overwrite = False
@with_spinner()
def flatten(self, add_data=True):
"""
Flatten the input light curve (``dataset``) using lightkurve.flatten.
Parameters
----------
add_data : bool
Whether to add the resulting light curve as a flux column and select that as the new
flux column (origin) for that data entry.
Returns
-------
output_lc : `~lightkurve.LightCurve`
The flattened light curve.
trend_lc : `~lightkurve.LightCurve`
The trend used to flatten the light curve.
"""
input_lc = self.dataset.selected_obj
if input_lc is None: # pragma: no cover
raise ValueError("no input dataset selected")
output_lc, trend_lc = input_lc.flatten(return_trend=True,
window_length=self.window_length,
polyorder=self.polyorder,
break_tolerance=self.break_tolerance,
niters=self.niters,
sigma=self.sigma)
if self.unnormalize:
factor = np.nanmedian(trend_lc.flux.value)
output_lc.flux *= factor
output_lc.flux_err *= factor
output_lc.meta['NORMALIZED'] = False
if add_data:
# add data as a new flux and corresponding err columns in the existing data entry
# and select as flux column (origin)
data = _data_with_reftime(self.app, output_lc)
self.flux_column.add_new_flux_column(flux=data['flux'],
flux_err=data['flux_err'],
label=self.flux_label.value,
selected=True)
return output_lc, trend_lc
def _clear_marks(self):
for mark_set in self.marks:
for mark in mark_set.values():
if mark.visible:
mark.clear()
mark.visible = False
@observe('is_active', 'show_live_preview', 'show_trend_preview')
def _toggle_marks(self, event={}):
live_visible = self.show_live_preview and self.is_active
trend_visible = self.show_trend_preview and self.is_active
trend_marks, flattened_marks = self.marks
for mark in trend_marks.values():
mark.visible = trend_visible
for mark in flattened_marks.values():
mark.visible = live_visible
if ((live_visible or trend_visible) and
event.get('name') in ('is_active', 'show_live_preview', 'show_trend_preview')):
# then the marks themselves need to be updated
self._live_update(event)
@observe('dataset_selected', 'flux_column_selected',
'window_length', 'polyorder', 'break_tolerance',
'niters', 'sigma', 'previews_temp_disabled')
@skip_if_no_updates_since_last_active()
@with_temp_disable(0.3)
def _live_update(self, event={}):
if self.dataset_selected == '' or self.flux_column_selected == '':
self._clear_marks()
return
try:
output_lc, trend_lc = self.flatten(add_data=False)
except Exception as e:
self.flatten_err = str(e)
self._clear_marks()
return
self.flatten_err = ''
if event.get('name') not in ('is_active', 'show_live_preview', 'show_trend_preview'):
# mark visibility hasn't been handled yet
self._toggle_marks(event)
if self.unnormalize:
output_flux = output_lc.flux.value
else:
output_flux = output_lc.flux.value * np.nanmedian(trend_lc.flux.value)
ref_time = trend_lc.meta.get('reference_time', 0)
times = trend_lc.time - ref_time
trend_marks, flattened_marks = self.marks
for mark in trend_marks.values():
# TODO: need to account for phasing
mark.update_ty(times.value, trend_lc.flux.value)
for mark in flattened_marks.values():
mark.update_ty(times.value, output_flux)
[docs]
def vue_apply(self, *args, **kwargs):
try:
self.flatten(add_data=True)
except Exception as e:
self.flatten_err = str(e)
else:
self.flatten_err = ''
