lsst.shapelet  22.0.1-1-g8e32f31+c301705fd4
Functions
lsst.shapelet.tractor Namespace Reference

Functions

def registerRadialProfiles ()
 
def evaluateRadial (basis, r, sbNormalize=False, doComponents=False)
 
def integrateNormalizedFluxes (maxRadius=20.0, nSteps=5000)
 
def plotSuite (doComponents=False)
 

Function Documentation

◆ evaluateRadial()

def lsst.shapelet.tractor.evaluateRadial (   basis,
  r,
  sbNormalize = False,
  doComponents = False 
)
Plot a single-element MultiShapeletBasis as a radial profile.

Parameters
----------
sbNormalize : `bool`
    `True` to normalize.
doComponents : `bool`
    `True` to evaluate components.

Definition at line 86 of file tractor.py.

◆ integrateNormalizedFluxes()

def lsst.shapelet.tractor.integrateNormalizedFluxes (   maxRadius = 20.0,
  nSteps = 5000 
)
Integrate the profiles to compare relative fluxes between the true profiles
and their approximations.

After normalizing by surface brightness at r=1 r_e, integrate the profiles to compare
relative fluxes between the true profiles and their approximations.

Parameters
----------
maxRadius : `float`, optional
    Maximum radius to integrate the profile, in units of r_e.
nSteps : `int`, optional
    Number of concrete points at which to evaluate the profile to
    do the integration (we just use the trapezoidal rule).

Returns
-------
fluxes : `dict` of `float` values
    Dictionary of fluxes (``exp``, ``lux``, ``dev``, ``luv``, ``ser2``, ``ser3``,
    ``ser5``, ``gexp``,  ``glux``, ``gdev``, ``gluv``, ``gser2``, ``gser3``, ``gser5``)

Definition at line 116 of file tractor.py.

◆ plotSuite()

def lsst.shapelet.tractor.plotSuite (   doComponents = False)
Plot all the profiles defined in this module together.

Plot all the profiles defined in this module together: true exp and dev,
the SDSS softened/truncated lux and luv, and the multi-Gaussian approximations
to all of these.

Parameters
----------
doComponents : `bool`, optional
    True, to plot the individual Gaussians that form the multi-Gaussian approximations.

Returns
-------
figure : `matplotlib.figure.Figure`
    Figure that contains the plot.
axes : `numpy.ndarray` of `matplotlib.axes.Axes`
    A 2x4 NumPy array of matplotlib axes objects.

Definition at line 149 of file tractor.py.

◆ registerRadialProfiles()

def lsst.shapelet.tractor.registerRadialProfiles ( )
Register the pickled profiles in the data directory with the RadialProfile
singleton registry.

This should only be called at import time by this module; it's only a function to
avoid polluting the module namespace with all the local variables used here.

Definition at line 41 of file tractor.py.