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Otmar Ertl commented on MATH-1285: ---------------------------------- Thanks for reporting this. I have changed the reference to Wikipedia's article about Zipf's law. See https://en.wikipedia.org/wiki/Zipf's_law. 3.6: 5f03f0d702574a9c5655778ee28fe3e23d86a9b0 4.0: 8ed2209b1f8e2452d71ef8c3149f3ed3d89d4dfa > Description API ZipfDistribution > -------------------------------- > > Key: MATH-1285 > URL: https://issues.apache.org/jira/browse/MATH-1285 > Project: Commons Math > Issue Type: Improvement > Environment: All > Reporter: Pim van der Hoorn > Priority: Minor > Labels: easyfix > Original Estimate: 1h > Remaining Estimate: 1h > > The description of the constructors for the ZipfDistribution class specifies > an argument of type doule, called exponent. The documentation refers to a > MathWorld page where the distribution is defined. However, here the exponent > p, is the exponent of the cdf, not of the pdf (which is then p + 1). After > running some test I found that the exponent in the constructor is the one for > the pdf. This can create confusion among users. Therefore I recommend > specifying in the documentation which exponent is meant. -- This message was sent by Atlassian JIRA (v6.3.4#6332)