Why L1 for stationary kernels by default?
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Description
Hi Dan,
I really like this library; thank you for designing it.
I'm working on extending it to specialized algebra for spectral kernels.
My question: in stationary.py, why is the default Distance for Stationary kernels L1Distance?
This has the consequence that eg. Matern32 kernel with default instantiation has non-standard behavior whenever the input dimension is larger than 1.
I'm not sure if many users would suspect this behavior, even though it is documented.
Cheers,
Marnix
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with stationary.py and inspect how Stationary selects its default Distance, especially L1Distance, alongside Matern32 behavior for multidimensional inputs. Confirm the design rationale and clarify the documented consequences; done means the default's purpose and non-standard multidimensional behavior are clearly explained.
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Assessment
- Tech stack
- python
- Domain
- machine-learning
- Issue type
- Documentation
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100