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Posted to jira@arrow.apache.org by "Wes McKinney (Jira)" <ji...@apache.org> on 2020/06/15 22:57:00 UTC

[jira] [Created] (ARROW-9142) [C++] random::RandomArrayGenerator::Boolean "probability" misdocumented / incorrect

Wes McKinney created ARROW-9142:
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             Summary: [C++] random::RandomArrayGenerator::Boolean "probability" misdocumented / incorrect
                 Key: ARROW-9142
                 URL: https://issues.apache.org/jira/browse/ARROW-9142
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
            Reporter: Wes McKinney
            Assignee: Wes McKinney
             Fix For: 1.0.0


I would expect {{rng.Boolean(length, 0.99)}} to generate an array that is 99% "true" on average. 

The docs say "/// \param[in] probability the estimated number of active bits", but this is not what the function does (the opposite, actually). 



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