lsst.pipe.tasks.functors.RadiusFromQuadrupole Class Reference

Inheritance diagram for lsst.pipe.tasks.functors.RadiusFromQuadrupole:

Public Member Functions
	__init__ (self, colXX, colXY, colYY, **kwargs)
	columns (self)

Public Attributes
	colXX
	colXY
	colYY

Protected Member Functions
	_func (self, df)

Detailed Description

Calculate the radius from the quadrupole moments.

This returns the fourth root of the determinant of the second moments
tensor, which has units of pixels.

See Also
--------
SdssTraceSize
HsmTraceSize

Definition at line 1162 of file functors.py.

Constructor & Destructor Documentation

__init__()

lsst.pipe.tasks.functors.RadiusFromQuadrupole.__init__	(		self,
			colXX,
			colXY,
			colYY,
		**	kwargs )

Reimplemented from lsst.pipe.tasks.functors.Functor.

Definition at line 1174 of file functors.py.

    def __init__(self, colXX, colXY, colYY, **kwargs):
        self.colXX = colXX
        self.colXY = colXY
        self.colYY = colYY
        super().__init__(**kwargs)
 

Member Function Documentation

_func()

lsst.pipe.tasks.functors.RadiusFromQuadrupole._func ( self, df )

protected

Reimplemented from lsst.pipe.tasks.functors.Functor.

Definition at line 1184 of file functors.py.

    def _func(self, df):
        return (df[self.colXX]*df[self.colYY] - df[self.colXY]**2)**0.25
 
 

columns()

lsst.pipe.tasks.functors.RadiusFromQuadrupole.columns

(

self

)

Columns required to perform calculation.

Reimplemented from lsst.pipe.tasks.functors.Functor.

Definition at line 1181 of file functors.py.

    def columns(self):
        return [self.colXX, self.colXY, self.colYY]
 

Member Data Documentation

colXX

lsst.pipe.tasks.functors.RadiusFromQuadrupole.colXX

Definition at line 1175 of file functors.py.

colXY

lsst.pipe.tasks.functors.RadiusFromQuadrupole.colXY

Definition at line 1176 of file functors.py.

colYY

lsst.pipe.tasks.functors.RadiusFromQuadrupole.colYY

Definition at line 1177 of file functors.py.

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The documentation for this class was generated from the following file:

• /j/snowflake/release/lsstsw/stack/lsst-scipipe-8.0.0/Linux64/pipe_tasks/g14a832a312+311607e4ab/python/lsst/pipe/tasks/functors.py