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tape.analysis.structurefunction2

tape.analysis.structurefunction2#

Module Contents#

Classes#

StructureFunction2

Calculate structure function squared

Attributes#

calc_sf2

class StructureFunction2[source]#

Bases: tape.analysis.base.AnalysisFunction

Calculate structure function squared

cols(ens: Ensemble) → List[str][source]#

Return the column names that the analysis function takes as input.

Parameters:

ens (Ensemble) – The ensemble object, it could be required to get column names of the “special” columns like ens._time_col or ens._err_col.

Returns:

The column names to select and pass to .calculate() method. For example [ens._time_col, ens._flux_col].

Return type:

List[str]

meta(ens: Ensemble) → Dict[str, type][source]#

Return the schema of the analysis function output.

Parameters:

ens (Ensemble) – The ensemble object.

Returns:

pd.DataFrame or (str, dtype) tuple or {str – Dask meta, for example pd.DataFrame(columns=[‘x’, ‘y’], dtype=float).

Return type:

dtype} dictionary

on(ens: Ensemble) → List[str][source]#

Return the columns to group source table by.

Parameters:

ens (Ensemble) – The ensemble object.

Returns:

The column names to group by. Typically, [ens._id_col].

Return type:

List[str]

__call__(time, flux, err=None, band=None, lc_id=None, *, sf_method='basic', argument_container=None) → pandas.DataFrame[source]#

Calculate structure function squared using one of a variety of structure function calculation methods defined by the input argument sf_method, or in the argument container object.

Parameters:

  • time (numpy.ndarray (N,) or None) – Array of times when measurements were taken. If all array values are None or if a scalar None is provided, then equidistant time between measurements is assumed.

  • flux (numpy.ndarray (N,)) – Array of flux/magnitude measurements.

  • err (numpy.ndarray (N,), float, or None, optional) – Array of associated flux/magnitude errors. If a scalar value is provided we assume that error for all measurements. If None is provided, we assume all errors are 0. By default None

  • band (numpy.ndarray (N,), optional) – Array of associated band labels, by default None

  • lc_id (numpy.ndarray (N,), optional) – Array of lightcurve ids per data point. By default None

  • sf_method (str, optional) – The structure function calculation method to be used, by default “basic”.

  • argument_container (StructureFunctionArgumentContainer, optional) – Container object for additional configuration options, by default None.

Returns:

sf2 – Structure function squared for each of input bands.

Return type:

pandas.DataFrame

Notes

In case that no value for band_to_calc is passed, the function is executed on all available bands in band.

calc_sf2[source]#
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