Add various statistical distributions to Gen. #656
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This commit adds support for several statistical distributions: - Gaussian (normal) - Exponential - Geometric - Poisson - Binomial These distributions are likely to be useful for writing generators, as well as for fine-grained control of numerical ranges. Currently, authors using Gen.choose have to decide whether to forbid testing with large Double values (by using a small range), or to allow large values (in which case their test will be dominated by large values). One solution is to use distributions where large values are possible but rare, such as an exponential distribution. Similarly, authors can use a geometric distribution to generate the size of a collection which is usually small, but may occasionally be large.
ashawley
approved these changes
May 13, 2020
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Very cool! 👍 |
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This commit adds support for several statistical distributions:
These distributions are likely to be useful for writing generators, as
well as for fine-grained control of numerical ranges.
Currently, authors using Gen.choose have to decide whether to forbid
testing with large Double values (by using a small range), or to allow
large values (in which case their test will be dominated by large
values). One solution is to use distributions where large values are
possible but rare, such as an exponential distribution.
Similarly, authors can use a geometric distribution to generate the
size of a collection which is usually small, but may occasionally be
large.