question: private boolean repeat ( double [ ] repError , int entries ) { int i ; double mean = 0 ; double variance = 0 ; if ( m_threshold < 0 ) { return false ; } if ( entries == 1 ) { return true ; } for ( i = 0 ; i < entries ; i ++ ) { mean += repError [ i ] ; } mean /= entries ; for ( i = 0 ; i < entries ; i ++ ) { variance += ( ( repError [ i ] - mean ) * ( repError [ i ] - mean ) ) ; } variance /= entries ; if ( variance > 0 ) { variance = Math . sqrt ( variance ) ; } if ( ( variance / mean ) > m_threshold ) { return true ; } return false ; }
target:  decides whether to do another repeat of cross validation. If the standard deviation of the cross validations is greater than threshold% of the mean (default 1%) then another repeat is done.