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casacore
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casacore
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#include <Random.h>
Public Member Functions | |
| Poisson (RNG *gen, Double mean=0.0) | |
| Construct a random number generator for a Poisson distribution. More... | |
| virtual | ~Poisson () |
| The destructor is trivial. More... | |
| virtual Double | operator() () |
| Returns a value from the Poisson distribution. More... | |
| uInt | asInt () |
| Double | mean () const |
| Functions that allow you to query and change the parameters of the Poisson 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 |
Poisson distribution.
The Poisson class implements a Poisson 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. It is assumed that the supplied mean is non-negative and an AipsError exception is thrown if this is not true. The remaining members allow you to read and set the parameters.
Construct a random number generator for a Poisson 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.
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virtual |
The destructor is trivial.
| uInt casacore::Poisson::asInt | ( | ) |
Implements casacore::Random.
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inline |
| void casacore::Poisson::mean | ( | Double | x | ) |
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virtual |
Returns a value from the Poisson distribution.
The returned value is a non-negative integer and using the asInt function bypasses the conversion to a floating point number.
Implements casacore::Random.
Implements casacore::Random.
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.
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private |
1.8.5