openml / openml/openml.org

R2 value missing?

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Dominant language
TypeScript
Stars
33
Forks
30
Avg merge
2d 21h
Merged PRs (30d)
6

Description

Hi,

I am not able to find the R^2 value (coefficient of determination) for regression tasks in the result table. I see a lot of regression evaluation criteria but R^2 seems to be missing. When using specific definitions of R2 it is simply the square of the correlation coefficient (which exists on openml.org) but, unfortunately, this is not the case for the definition used in scikit-learn (which, in turn, is used in many frameworks such as AutoML Benchmark).

Does it really not exist? If so, what is the reason behind this and do you know of a workaround? Thanks in advance!

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First steps

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  3. Fork the repository and make your change on a branch.
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Research direction

Start by locating the result table and the regression evaluation criteria it displays. Compare the available metrics with scikit-learn's R² definition, then determine whether the requested value can be exposed there and verify that the table clearly reports it when complete.

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Assessment

Tech stack
scikit-learn, typescript
Domain
data, frontend
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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