if (!$self->{disableLogger} && $self->{logger}->is_trace()) { # test for efficiency (not to compute the expression) { $self->{logger}->trace("total NbObsThis $i=$nbObservedThisNGram->[$i]; nbObsAll $i=$nbObservedAllNGrams->[$i]; total=$totalObservedAll; nbExpected $i=$nbExpectedThis[$i]; chisq = $chiSquare[$i]") }