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verify that pop is not empty before attempting to compute the IQR

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Johann Dreo 2010-11-15 09:13:39 +01:00
commit fb8a8d79fd
1 changed files with 14 additions and 9 deletions
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23
eo/src/utils/eoStat.h
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@ -38,7 +38,7 @@ Contact: http://eodev.sourceforge.net
#include <utils/eoParam.h>
#include <eoPop.h>
#include <utils/eoMonitor.h>
#include <utils/eoCheckPoint.h>
//#include <utils/eoCheckPoint.h>
/** @defgroup Stats Statistics computation
*
@ -435,16 +435,21 @@ public:
virtual void operator()( const eoPop<EOT> & _pop )
{
eoPop<EOT> pop = _pop;
if( _pop.size() == 0 ) {
// how to implement value() = 0 ?
unsigned int quartile = pop.size()/4;
std::nth_element( pop.begin(), pop.begin()+quartile*1, pop.end() );
typename EOT::Fitness Q1 = pop[quartile].fitness();
std::nth_element( pop.begin(), pop.begin()+quartile*3, pop.end() );
typename EOT::Fitness Q3 = pop[quartile*3].fitness();
} else {
eoPop<EOT> pop = _pop;
value() = Q1 - Q3;
unsigned int quartile = pop.size()/4;
std::nth_element( pop.begin(), pop.begin()+quartile*1, pop.end() );
typename EOT::Fitness Q1 = pop[quartile].fitness();
std::nth_element( pop.begin(), pop.begin()+quartile*3, pop.end() );
typename EOT::Fitness Q3 = pop[quartile*3].fitness();
value() = Q1 - Q3;
}
}
virtual std::string className(void) const { return "eoInterquartileRangeStat"; }