Dive Deep into Metadata with Tplyr
summary
Tplyr 1.0.0 claims full traceability: tables record the exact variables and filters that produced each cell so you can recover the underlying rows. Enabling metadata = TRUE adds a per‑cell metadata object (row_id, col_id) and a helper get_meta_subset returns the actual subset (defaults to USUBJID but accepts any columns). The demo is an 85‑line Shiny app that wires summary cells to their source data and also works when metadata is appended to plain data frames.
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