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Merge PR #2194: calc: bound SUBTOTAL/AGGREGATE input work (#2175)

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docs/function-parity.md: status line takes this PR's change text; both history rows kept, newest first.
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aiongg
2026-10-22 02:35:07 +00:00
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# Function parity: worksheet functions and formulas
> **Last reviewed:** 2026-10-15 · **Last updated:** 2026-10-16 · **Change:** minor (FORECAST.ETS missing-point interpolation scans the timeline in linear work, #1042) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
> **Last reviewed:** 2026-10-15 · **Last updated:** 2026-10-21 · **Change:** minor (SUBTOTAL and AGGREGATE cap the cells they visit, #2175) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
Excel's worksheet functions, category by category, against GridCraft's function library. Part of
[target-app-parity.md](target-app-parity.md); gaps feed [gaps.md](gaps.md).
@@ -82,6 +82,7 @@ This improves series preparation; it does not change the model-fitting or season
| Defined names (workbook and sheet scope), Create from Selection | done |
| Dynamic arrays, spill, `#SPILL!`, spill operator `A1#` | done; stale-spill bugs (#133, #139; PRs #148, #157) |
| Recalculation after clearing large sparse ranges | every stored cell changed by Clear is reported to recalculation, without a million-coordinate cutoff; removed formula spills are cleared, and removing empty merges still unblocks spills (#1032) |
| SUBTOTAL / AGGREGATE input size | references trim to the used range; all areas, arrays and values of one call are charged against the 16-million-cell limit before any cell is read (skipped hidden, nested and error cells count), and `#NUM!` past it (#2175) |
| Implicit intersection `@`, legacy CSE array formulas | done; legacy array range fill (PR #156) |
| Trim references `A1:.E10` (trailing), `A1.:E10` (leading), `A1.:.E10` (both), also on whole rows/columns (`A:.A`) | done; evaluated as `TRIMRANGE(range, code, code)`, adjusted on insert/delete; files store `_xlfn.TRIMRANGE(range,code,code)` (Excel's own file spelling unconfirmed in public docs), `_xlfn._TRO_ALL/_TRO_LEADING/_TRO_TRAILING(...)` read too |
| LET, LAMBDA, named LAMBDAs, ISOMITTED, MAP/REDUCE/SCAN/BYROW/BYCOL/MAKEARRAY | done |
@@ -119,6 +120,7 @@ workbooks; results checked in as data, not Excel files) and fixing what it finds
| Date | Change | Summary |
|---|---|---|
| 2026-10-21 | minor | SUBTOTAL and AGGREGATE charge every argument against the evaluator's 16-million-cell limit before scanning; a value in XFD1048576 no longer makes `SUBTOTAL(9,A:XFD)` read the whole sheet (#2175) |
| 2026-10-16 | minor | FORECAST.ETS gap interpolation uses a forward-only known-point scan instead of rescanning each gap for every missing value; numerical behavior and missing-point limits are preserved (#1042) |
| 2026-10-15 | minor | MEDIAN and AGGREGATE median use an overflow-safe midpoint (#1579); regressions cover finite extremes, tiny values and dependent recalculation |
| 2026-10-13 | minor | Clear reports changed stored cells sparsely, including those beyond the first million coordinates; dependent formulas and removed spills update, while clearing empty merges still unblocks spills (#1032) |