tensorflow / tensorflow/probability

`cdf` in `distributions.NormalInverseGaussian` not implemented?

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Description

Hi,

Is the cdf() function from distributions.NormalInverseGaussian currently working? or is it in the pipeline? as I seem to be getting the following error when attempting to use it:

NotImplementedError: cdf is not implemented: NormalInverseGaussian

I see it appears in the docs here:
https://www.tensorflow.org/probability/api_docs/python/tfp/distributions/NormalInverseGaussian

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Research direction

Start by checking the NormalInverseGaussian distribution API and its documented cdf entry against the current implementation. Confirm whether the missing behavior is an unimplemented feature or an incorrect documentation claim, then define the expected cdf behavior and verify that calling cdf no longer raises NotImplementedError.

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Assessment

Tech stack
python
Domain
machine-learning
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
20/100

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