Provides std::exponential_distribution, Exp(λ), for symbolic expressions.
When operator() is called, it returns a symbolic expression v / λ
where v is a symbolic random variable associated with the standard exponential distribution (λ = 1).
#include <drake/common/symbolic/expression/expression.h>
Public Types | |
using | RealType = drake::symbolic::Expression |
using | result_type = RealType |
Public Member Functions | |
exponential_distribution (RealType lambda) | |
Constructs a new distribution object with lambda . More... | |
exponential_distribution () | |
Constructs a new distribution object with lambda = 1.0. More... | |
void | reset () |
Resets the internal state of the distribution object. More... | |
result_type | operator() () |
Generates a symbolic expression representing a random value that is distributed according to the associated probability function. More... | |
template<class Generator > | |
result_type | operator() (Generator &) |
Generates a symbolic expression representing a random value that is distributed according to the associated probability function. More... | |
RealType | lambda () const |
Returns the lambda λ distribution parameter. More... | |
result_type | min () const |
Returns the minimum potentially generated value. More... | |
result_type | max () const |
Returns the maximum potentially generated value. More... | |
Implements CopyConstructible, CopyAssignable, MoveConstructible, MoveAssignable | |
exponential_distribution (const exponential_distribution &)=default | |
exponential_distribution & | operator= (const exponential_distribution &)=default |
exponential_distribution (exponential_distribution &&)=default | |
exponential_distribution & | operator= (exponential_distribution &&)=default |
Friends | |
bool | operator== (const exponential_distribution< drake::symbolic::Expression > &lhs, const exponential_distribution< drake::symbolic::Expression > &rhs) |
using RealType = drake::symbolic::Expression |
using result_type = RealType |
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explicit |
Constructs a new distribution object with lambda
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std::exception | if lambda is a non-positive constant expression. |
exponential_distribution | ( | ) |
Constructs a new distribution object with lambda = 1.0.
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default |
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default |
RealType lambda | ( | ) | const |
Returns the lambda λ distribution parameter.
result_type max | ( | ) | const |
Returns the maximum potentially generated value.
result_type min | ( | ) | const |
Returns the minimum potentially generated value.
result_type operator() | ( | ) |
Generates a symbolic expression representing a random value that is distributed according to the associated probability function.
result_type operator() | ( | Generator & | ) |
Generates a symbolic expression representing a random value that is distributed according to the associated probability function.
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default |
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default |
void reset | ( | ) |
Resets the internal state of the distribution object.
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friend |