Coding & Debugging
PromptBeginner5 minmarkdown
application security (OWASP
STRIDE threat modeling) and code architecture
29
- Factor indexing: `x[f]` uses integer codes of factor `f`
not its character labels. Use `x[as.character(f)]` for label-based indexing.
promptBeginner5 min to valuemarkdownQuality: 28
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May 11, 2026
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