Negative exponential distribution. More...
#include <Random.h>
Public Member Functions | |
| NegativeExpntl (RNG *gen, Double mean=1.0) | |
| Construct a random number generator for a negative exponential distribution. More... | |
| virtual | ~NegativeExpntl () |
| The destructor is trivial. More... | |
| virtual Double | operator() () |
| Returns a value from the negative exponential distribution. More... | |
| Double | mean () const |
| Functions that allow you to query and change the parameters of the negative exponential distribution. More... | |
| void | mean (Double x) |
| virtual void | setParameters (const Vector< Double > &parms) |
| These function allow you to manipulate the parameters (mean) described above through the base class. More... | |
| virtual Vector< Double > | parameters () const |
| virtual Bool | checkParameters (const Vector< Double > &parms) const |
 Public Member Functions inherited from casacore::Random | |
| virtual | ~Random () |
| A virtual destructor is needed to ensure that the destructor of derived classes gets used. More... | |
| RNG * | generator () |
| Functions that allow you to access and change the class that generates the random bits. More... | |
| void | generator (RNG *p) |
Private Attributes | |
| Double | itsMean |
Additional Inherited Members | |
| Public Types inherited from casacore::Random | |
| enum | Types { BINOMIAL , DISCRETEUNIFORM , ERLANG , GEOMETRIC , HYPERGEOMETRIC , NORMAL , LOGNORMAL , NEGATIVEEXPONENTIAL , POISSON , UNIFORM , WEIBULL , UNKNOWN , NUMBER_TYPES } |
| This enumerator lists all the predefined random number distributions. More... | |
| Static Public Member Functions inherited from casacore::Random | |
| static String | asString (Random::Types type) |
| Convert the enumerator to a lower-case string. More... | |
| static Random::Types | asType (const String &str) |
| Convert the string to enumerator. More... | |
| static Random * | construct (Random::Types type, RNG *gen) |
| Convert the Random::Type enumerator to a specific object (derived from Random but upcast to a Random object). More... | |
| static Vector< Double > | defaultParameters (Random::Types type) |
| returns the default parameters for the specified distribution. More... | |
| Protected Member Functions inherited from casacore::Random | |
| Random (RNG *generator) | |
| Protected Attributes inherited from casacore::Random | |
| RNG * | itsRNG |
Detailed Description
Negative exponential distribution.
Synopsis
The NegativeExpntl class implements a negative exponential distribution. The mean parameter, is the only parameter of this distribution. The operator() functions returns a value from this distribution. The remaining members allow you to inspect and change the mean.
Example
Thrown Exceptions
- No exceptions are thrown by this class.
To Do
- Nothing I hope!
Constructor & Destructor Documentation
◆ NegativeExpntl()
Construct a random number generator for a negative exponential 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 argument defines the parameters for this distribution as described in the synopsis.
◆ ~NegativeExpntl()
|
virtual |
The destructor is trivial.
Member Function Documentation
◆ checkParameters()
|
virtual |
Implements casacore::Random.
◆ mean() [1/2]
|
inline |
◆ mean() [2/2]
| void casacore::NegativeExpntl::mean | ( | Double | x | ) |
◆ operator()()
|
virtual |
Returns a value from the negative exponential distribution.
Implements casacore::Random.
◆ parameters()
Implements casacore::Random.
◆ setParameters()
These function allow you to manipulate the parameters (mean) described above through the base class.
The Vectors must always be of length one.
Implements casacore::Random.
Member Data Documentation
◆ itsMean
|
private |
The documentation for this class was generated from the following file:
- casa/BasicMath/Random.h
