public void setSkew ( double skew ) { if ( skew <= 0 || Double . isNaN ( skew ) || Double . isInfinite ( skew ) ) throw new IllegalArgumentException ( "Skew must be a positive value, not " + skew ) ; this . skew = skew ; fixCache ( ) ; }
Sets the skewness of the distribution . Lower values spread out the probability distribution while higher values concentrate on the lowest ranks .