tree 9736188bd65f1107c2223bccc02da677f2bbc516
parent 3b091c002f69701cfa4b40434dc3a9408d155493
author Marc Kupietz <kupietz@ids-mannheim.de> 1788164282 +0200
committer Marc Kupietz <kupietz@ids-mannheim.de> 1788164282 +0200

CA: flag imputed cells in multi-VC comparisons

When a collocate is attested in one virtual corpus but not in another,
add_multi_vc_comparisons() imputes the missing scores from a pooled floor.
The resulting delta/winner/loser columns then describe presence vs. absence
rather than a measured contrast, and nothing in the output said so.

Record the missingness pattern before imputation and expose it as
`imputed_<label>` (per label), `n_imputed` (count) and `imputed` (any), so
that `filter(!imputed)` keeps only collocates attested in every compared
virtual corpus.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Change-Id: I25fb0196f1b75519c126130fc19bc62d40675e17