question: public GaussianDensityFunction ( Double mean , Double variance ) { this . mean = new double [ ] { mean } ; this . variance = new double [ ] { variance } ; stdDev = new double [ ] { Math . sqrt ( variance ) } ; if ( variance < 0 ) { log . warning ( "variance should not be negative, but is : " + variance ) ; } }
target:  Creates a new, univariate density function with a given mean and variance