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MPI Distrib exp: added exponential distribution

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This commit is contained in:
Benjamin BOUVIER 2012-09-07 11:37:21 -04:00
commit 211ac8141e
1 changed files with 28 additions and 0 deletions
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28
eo/test/mpi/t-mpi-distrib-exp.cpp
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@ -130,6 +130,33 @@ class NormalDistribution : public Distribution
double _stddev; double _stddev;
} normalDistribution; } normalDistribution;
class ExponentialDistribution : public Distribution
{
public:
ExponentialDistribution() : _rng( 0 )
{
// empty
}
void make_parser( eoParser & parser )
{
_active = parser.createParam( false, "exponential", "Exponential distribution", '\0', "Exponential").value();
_mean = parser.createParam( 0.0, "exponential-mean", "Mean for the exponential distribution (0 by default), in ms.", '\0', "Exponential").value();
}
int next_element()
{
return std::floor( _rng.negexp( _mean ) );
}
protected:
eoRng _rng;
double _mean;
} exponentialDistribution;
int main( int argc, char** argv ) int main( int argc, char** argv )
{ {
Node::init( argc, argv ); Node::init( argc, argv );
@ -142,6 +169,7 @@ int main( int argc, char** argv )
std::vector<Distribution*> distribs; std::vector<Distribution*> distribs;
distribs.push_back( &uniformDistribution ); distribs.push_back( &uniformDistribution );
distribs.push_back( &normalDistribution ); distribs.push_back( &normalDistribution );
distribs.push_back( &exponentialDistribution );
// for each available distribution, check if activated. // for each available distribution, check if activated.
// If no distribution is activated, show an error message // If no distribution is activated, show an error message