SdssTraceSize¶
- class lsst.pipe.tasks.functors.SdssTraceSize(filt=None, dataset=None, noDup=None)¶
Bases:
Functor
Functor to calculate the SDSS trace radius size for sources.
The SDSS trace radius size is a measure of size equal to the square root of half of the trace of the second moments tensor measured with the SdssShapeAlgorithm plugin. This has units of pixels.
Attributes Summary
Columns required to perform calculation.
Do not explode by band if used on object table.
Methods Summary
__call__
(data[, dropna])Call self as a function.
difference
(data1, data2, **kwargs)Computes difference between functor called on two different DataFrame/Handle objects.
fail
(df)multilevelColumns
(data[, columnIndex, ...])Returns columns needed by functor from multilevel dataset.
Attributes Documentation
- columns¶
Columns required to perform calculation.
- name = 'SDSS Trace Size'¶
- noDup¶
Do not explode by band if used on object table.
- shortname = 'sdssTrace'¶
Methods Documentation
- __call__(data, dropna=False)¶
Call self as a function.
- difference(data1, data2, **kwargs)¶
Computes difference between functor called on two different DataFrame/Handle objects.
- fail(df)¶
- multilevelColumns(data, columnIndex=None, returnTuple=False)¶
Returns columns needed by functor from multilevel dataset.
To access tables with multilevel column structure, the
DeferredDatasetHandle
orInMemoryDatasetHandle
needs to be passed either a list of tuples or a dictionary.- Parameters:
- datavarious
The data as either
DeferredDatasetHandle
, orInMemoryDatasetHandle
.- columnIndex (optional): pandas `~pandas.Index` object
Either passed or read in from
DeferredDatasetHandle
.- `returnTuple`
bool
If true, then return a list of tuples rather than the column dictionary specification. This is set to
True
byCompositeFunctor
in order to be able to combine columns from the various component functors.