External validation and transportability reporting

Source-derived companion to gp3ml 0.3.0 vignette external-validation-reporting.Rmd. R code blocks are omitted here; the Python companion script is under examples/external-validation-reporting.py.

Development workflow

Explicit independent external dataset

Explicit absence of external validation

An internal holdout is never renamed external validation. The external result is specific to the declared dataset and context.