|
casa
$Rev:20696$
|
|
casa
$Rev:20696$
|
Normal or Gaussian distribution. More...
#include <Random.h>
Public Member Functions | |
| Normal (RNG *gen, Double mean=0.0, Double variance=1.0) | |
| Construct a random number generator for a normal distribution. | |
| virtual | ~Normal () |
| The destructor is trivial. | |
| virtual Double | operator() () |
| Returns a value from the normal distribution. | |
| virtual Double | mean () const |
| Functions that allow you to query and change the parameters of the 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 Attributes | |
| Double | itsMean |
| Double | itsVariance |
| Double | itsStdDev |
| Bool | itsCached |
| Double | itsCachedValue |
Normal or Gaussian distribution.
The Normal class implements the normal or Gaussian 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. The LogNormal class is derived from this one.
| casa::Normal::Normal | ( | RNG * | gen, |
| Double | mean = 0.0, |
||
| Double | variance = 1.0 |
||
| ) |
Construct a random number generator for a 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::Normal::~Normal | ( | ) | [virtual] |
The destructor is trivial.
| virtual Bool casa::Normal::checkParameters | ( | const Vector< Double > & | parms | ) | const [virtual] |
Implements casa::Random.
Reimplemented in casa::LogNormal.
| Double casa::Normal::mean | ( | ) | const [inline, virtual] |
Functions that allow you to query and change the parameters of the normal distribution.
Reimplemented in casa::LogNormal.
Definition at line 1038 of file Random.h.
References itsMean.
| virtual void casa::Normal::mean | ( | Double | x | ) | [virtual] |
Reimplemented in casa::LogNormal.
| virtual Double casa::Normal::operator() | ( | ) | [virtual] |
Returns a value from the normal distribution.
Implements casa::Random.
Reimplemented in casa::LogNormal.
| virtual Vector<Double> casa::Normal::parameters | ( | ) | const [virtual] |
Implements casa::Random.
Reimplemented in casa::LogNormal.
| virtual void casa::Normal::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.
Implements casa::Random.
Reimplemented in casa::LogNormal.
| Double casa::Normal::variance | ( | ) | const [inline, virtual] |
| virtual void casa::Normal::variance | ( | Double | x | ) | [virtual] |
Reimplemented in casa::LogNormal.
Bool casa::Normal::itsCached [private] |
Double casa::Normal::itsCachedValue [private] |
Double casa::Normal::itsMean [private] |
Double casa::Normal::itsStdDev [private] |
Double casa::Normal::itsVariance [private] |
Definition at line 1032 of file Random.h.
Referenced by variance().
1.8.0
