Define SpecialFunctions.gamma_inc for ForwardDiff.Dual#587
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@@ Coverage Diff @@
## master #587 +/- ##
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- Coverage 86.63% 86.49% -0.15%
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Files 9 9
Lines 898 896 -2
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- Hits 778 775 -3
- Misses 120 121 +1
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Any idea why this one is failing on nightly? |
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No, I'll have a look when I'm back from vacation next week. |
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Author
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I reran the tests and it seems they pass now. Maybe some recent change in Julia nightly or SpecialFunctions fixed the test errors. |
andreasnoack
approved these changes
Aug 4, 2022
3 tasks
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This PR adds a definition of
SpecialFunctions.gamma_inc(::Real, ::Dual, ::Integer).Similar to
logabsgamma(added in #585) this function returns a tuple and hence is not handled by DiffRules.As in the CR definitions in SpecialFunctions, only the derivatives with respect to the second argument are defined since derivatives wrt to the first argument are given in terms of (regularized) hypergeometric functions and hence would require additional dependencies (see JuliaMath/SpecialFunctions.jl#317). The third argument indicates the desired accuracy, and hence the function is not differentiable wrt to the third argument anyway.