Update "Differences between R and Patsy Formulas" to state that dot on RHS is not supported

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Assessment

Difficulty
1/5
Estimated time
Under an hour
Newbie friendliness
45/100
Issue type
Documentation
Clarity
Clearly specified
Activity status
Stale
Tech stack
python
Domain
documentation

Research direction

Open the Comparison to R section in R-comparison.html and review the discussion linked from issue 10. Update that documentation to state that Patsy does not support a dot on the right-hand side of a formula; the work is done when this difference from R is clearly documented.

Written by the indexing model from the issue text.

Description

As discussed in https://github.com/pydata/patsy/issues/10, the dot/period on the RHS of a formula is not currently supported in Patsy. Could you update the docs, in the Comparison to R section https://patsy.readthedocs.io/en/latest/R-comparison.html, to mention this difference? Dot on the RHS is used quite extensively in R — in fact, most basic examples are written with it — so this is definitely a difference people will notice.

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Merged PRs (30d)
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