General
PromptBeginner5 minmarkdown
Untitled Skill
170
- `options(contrasts = c(contr.treatment
contr.poly))`: default contrasts for unordered/ordered factors.
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Apr 15, 2026
Time
5 min
Difficulty
Beginner
Type
prompt
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Single file
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Skill content
Main instructions and any bundled files for this skill.
- `options(contrasts = c(contr.treatment
contr.poly))`: default contrasts for unordered/ordered factors.
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