pydata / pydata/patsy

Preserving column order for categoricals

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Dominant language
Python
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Merged PRs (30d)
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Description

https://groups.google.com/forum/#!topic/pystatsmodels/ZvsyZag3xaw

import patsy
import pandas as pd
cps = pd.read_csv("http://www.mosaic-web.org/go/datasets/cps.csv")
patsy.dmatrix("age + educ + married", data=cps)

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Research direction

Read the linked Google Groups discussion and reproduce the provided patsy.dmatrix example with the CPS dataset. Trace how categorical columns are ordered and compare the result with the ordering requested in the discussion. Done means the intended categorical column order is preserved and the example demonstrates the corrected behavior.

Written by the indexing model from the issue text.

Assessment

Tech stack
pandas, python
Domain
data
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
20/100

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