casa::LogNormal Class Reference

Logarithmic normal distribution. More...

#include <Random.h>

Inheritance diagram for casa::LogNormal:

List of all members.

Public Member Functions
	LogNormal (RNG *gen, Double mean=1.0, Double variance=1.0)
	Construct a random number generator for a log-normal distribution.
virtual	~LogNormal ()
	The destructor is trivial.
virtual Double	operator() ()
	Returns a value from the log-normal distribution.
virtual Double	mean () const
	Functions that allow you to query and change the parameters of the log-normal distribution.
virtual void	mean (Double x)
virtual Double	variance () const
virtual void	variance (Double x)
virtual void	setParameters (const Vector< Double > &parms)
	These function allow you to manipulate the parameters (mean & variance) described above through the base class.
virtual Vector< Double >	parameters () const
virtual Bool	checkParameters (const Vector< Double > &parms) const
Private Member Functions
void	setState ()
Private Attributes
Double	itsLogMean
Double	itsLogVar

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Detailed Description

Logarithmic normal distribution.

Synopsis

The LogNormal class implements the logaraithmic normal distribution. The mean and variance are the parameters of the distribution. The operator() functions returns a value from this distribution

It is assumed that the supplied variance is positive and an AipsError exception is thrown if this is not true. The remaining members allow you to read and set the parameters.

Example

Thrown Exceptions

• AipsError: if bad values for the arguments are given, as specified above.

To Do

• Nothing I hope!

Definition at line 1071 of file Random.h.

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Constructor & Destructor Documentation

casa::LogNormal::LogNormal	(	RNG *	gen,
		Double	mean = 1.0,
		Double	variance = 1.0
	)

Construct a random number generator for a log-normal distribution.

The first argument is a class that produces random bits. This pointer is NOT taken over by this class and the user is responsible for deleting it. The second and third arguments define the parameters for this distribution as described in the synopsis.

virtual casa::LogNormal::~LogNormal

(

)

[virtual]

The destructor is trivial.

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Member Function Documentation

virtual Bool casa::LogNormal::checkParameters

(

const Vector< Double > &

parms

)

const [virtual]

Reimplemented from casa::Normal.

Double casa::LogNormal::mean

(

)

const [inline, virtual]

Functions that allow you to query and change the parameters of the log-normal distribution.

Reimplemented from casa::Normal.

Definition at line 1110 of file Random.h.

References itsLogMean.

virtual void casa::LogNormal::mean

(

Double

x

)

[virtual]

Reimplemented from casa::Normal.

virtual Double casa::LogNormal::operator()

(

)

[virtual]

Returns a value from the log-normal distribution.

Reimplemented from casa::Normal.

virtual Vector<Double> casa::LogNormal::parameters

(

)

const [virtual]

Reimplemented from casa::Normal.

virtual void casa::LogNormal::setParameters

(

const Vector< Double > &

parms

)

[virtual]

These function allow you to manipulate the parameters (mean & variance) described above through the base class.

The Vectors must always be of length two.

Reimplemented from casa::Normal.

void casa::LogNormal::setState

(

)

[private]

Double casa::LogNormal::variance

(

)

const [inline, virtual]

Reimplemented from casa::Normal.

Definition at line 1114 of file Random.h.

References itsLogVar.

virtual void casa::LogNormal::variance

(

Double

x

)

[virtual]

Reimplemented from casa::Normal.

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Member Data Documentation

Double casa::LogNormal::itsLogMean [private]

Definition at line 1106 of file Random.h.

Referenced by mean().

Double casa::LogNormal::itsLogVar [private]

Definition at line 1107 of file Random.h.

Referenced by variance().

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

• casacore/casa/BasicMath/Random.h