Provides sampling of data for esimation algorithms. More...

#include <DataSampling.h>

Inheritance diagram for casa::DataSampling:

Public Member Functions
	DataSampling ()
	DataSampling (const DataSampling &other)
	Copy constructor.
DataSampling &	operator= (const DataSampling &other)
	Assignment operator.
virtual	~DataSampling ()
const Array< Float > &	getDX () const
const Array< Float > &	getData () const
const Array< Float > &	getSigma () const
const Array< Float > &	getPRF () const
String	getIDLScript () const
Protected Member Functions
void	ok ()
Protected Attributes
Array< Float >	dx_p
Array< Float >	data_p
Array< Float >	sigma_p
Array< Float >	prf_p
Int	lastRow
String	IDLScript_p

Detailed Description

Provides sampling of data for esimation algorithms.

Intended use:

Public interface

Etymology

Samples Data as needed for various estimation algorithms

Synopsis

Esimation algorithms such as the Pixon method need sampled and unitless versions of the data. This class is a base class for such sampling classes. Derived examples are for single dish imaging (SDDataSampling) and image deconvolution (ImageDataSampling).

THe calculated quantities are

The Data Sampling Function: the coordinates of the sampled points in some space
The Data: the actual data points corresponding to the Data Sampling Function
The Error: the error per data point.
The Point Response Function in that space

The DataSampling object is constructed with the data sources as arguments, and then the calculate method is used to find the above quantities. The estimation method may then retrieve the data quantities as needed.

Example

Define an estimator PixonProcessor pp;

Get the model image PagedImage<Float> modelImage(modelName);

Set up the data sampling VPSkyJones vp(ms, True, parAngleInc, squintType); SDDataSampling ds(ms, vp);

Calculating data sampling, etc.
```
ds.calculate(modelImage);
```
Finding pixon solution pp.calculate(ds);

Motivation

Define an interface to allow efficient processing of chunks of data