Vignette: working with PFTs (offline, using packaged data only)

[dlebauer]

Goal

• Provide a short vignette demonstrating PFT-related analysis using only packaged datasets.

Tasks

• Add a vignette (e.g., vignettes/pfts.Rmd or pfts.qmd) that:
  • loads betydata
  • joins traitsview to PFT mapping tables (as shipped)
  • demonstrates at least two common tasks:
    • summarize trait distributions by PFT
    • visualize trait distributions by PFT
• Keep runtime small; use the packaged data only (no DB/API).

Acceptance criteria

• R CMD check builds the vignette successfully.
• Vignette produces at least one table and one plot that a scientist would find useful.

Non-goals

• No exhaustive tutorial; keep it lean.