getInitialValues        Calculates initial values for the parameters of
                        the models.
moezipf                 The Marshal-Olkin Extended Zipf Distribution
                        (MOEZipf).
moezipfFit              MOEZipf parameters estimation.
moezipfMean             Expected value.
moezipfMoments          Distribution Moments.
moezipfVariance         Variance of the MOEZipf distribution.
zi_zipfpss              The Zero Inflated Zipf-Poisson Stop Sum
                        Distribution (ZI Zipf-PSS).
zi_zipfpssFit           Zero Inflated Zipf-PSS parameters estimation.
zipfPolylog             The Zipf-Polylog Distribution (Zipf-Polylog).
zipfPolylogFit          ZipfPolylog parameters estimation.
zipfpe                  The Zipf-Poisson Extreme Distribution
                        (Zipf-PE).
zipfpeFit               Zipf-PE parameters estimation.
zipfpeMean              Expected value of the Zipf-PE distribution.
zipfpeMoments           Distribution Moments.
zipfpeVariance          Variance of the Zipf-PE distribution.
zipfpolylogMean         Expected value of the ZipfPolylog distribution.
zipfpolylogMoments      Moments of the Zipf-Polylog Distribution.
zipfpoylogVariance      Variance of the ZipfPolylog distribution.
zipfpss                 The Zipf-Poisson Stop Sum Distribution
                        (Zipf-PSS).
zipfpssFit              Zipf-PSS parameters estimation.
zipfpssMean             Expected value of the Zipf-PSS distribution.
zipfpssMoments          Distribution Moments.
zipfpssVariance         Variance of the Zipf-PSS distribution.
