- compute_svd_for_window now computes explained variance ratio (s²/sum(s²))
and appends it as a metadata row (entity_type='metadata',
entity_id='explained_variance') to motion_rows
- load_scree_data reads this metadata row from svd_vectors instead of
querying the non-existent sv_metadata column
- run_svd_for_window counts only entity_type='motion' rows in stored_motion
so metadata rows don't inflate the count
- Added 5 TDD tests covering load, compute, store, and round-trip
All 227 tests pass.
- load_scree_data: return [] with TODO until schema stores EVR metadata
- load_party_axis_scores: compute from vectors instead of missing table
- load_party_axis_scores_for_window: same vector-based fallback
- load_party_scores_all_windows[_aligned]: check table existence,
fall back to computing from load_positions when absent
All functions predated decomposition (5afbad1, 2026-04-05) and relied on
party_axis_scores / sv_metadata columns that were never created.
- analysis/explorer_data.py: add AND window_id NOT LIKE '%-Q%' to
_UNIFORM_DIM_SQL so quarterly windows are filtered at the source
- explorer.py: remove stale comment justifying quarterly inclusion;
remove redundant '-Q' guard in SVD tab trajectory view
- scripts/recompute_svd.py: replace quarter_bounds() with year_bounds()
that handles annual window IDs like '2024'; filter window list to
annual-only before recomputing SVD
Allow analysis modules to be imported in lightweight test environments
without duckdb installed. Modules that need duckdb for actual queries
still require it at runtime, but import-time failures are handled gracefully.
- Add CANONICAL_RIGHT (PVV, FVD, JA21, SGP) and CANONICAL_LEFT frozensets
to analysis/config.py as the canonical source of truth
- Update analysis/svd_labels.py to import from config; re-export as
RIGHT_PARTIES/LEFT_PARTIES for backward compatibility
- Add build_window_party_scores helper to analysis/explorer_data.py
- Add 7 integration tests in tests/test_axis_political_orientation.py
validating that canonical right parties appear on the right side of SVD
axes (x=component 1, y=component 2) using real DuckDB data
Sven Geboers