align

align

Align the events tables of multiple :class:EventLog instances to a shared column set.

Different detectors emit the same 9-column canonical core but different extra columns (standard-attr extensions, <pack>:<col> passthroughs). :func:concat already unions columns on merge, but when callers want to append / stack the per-detector frames themselves they need every frame to expose an identical column set first. :func:align_columns provides that.

align_columns

align_columns(*logs: EventLog) -> list[EventLog]

Reindex every log's events table to the union of their columns.

Each returned :class:EventLog exposes an identical, identically-ordered set of event columns — the canonical core first (in emit order), then the remaining attribute columns sorted for determinism. Columns absent from a given log are added and filled with NA, so the frames can be appended or stacked directly without a column mismatch. objects and relations already have fixed schemas and are returned unchanged.

Returns a list parallel to the inputs. An empty call returns [].