Functions: FORECAST.ETS, .CONFINT, .SEASONALITY and .STAT (#314)
AAA exponential smoothing (Hyndman et al. 2008, ETS(A,A,A)) over an evenly spaced timeline: documented seasonality, data completion and aggregation arguments, calendar-month date timelines, autocorrelation seasonality detection, state-space prediction intervals, statistic types 1-8. Smoothing parameters minimise the in-sample SSE (grid + clamped Nelder-Mead). XLSX export treats the family's range arguments as array-taking (no spurious dynamic-array metadata), FORECAST/FORECAST.LINEAR included. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
vangel76
parent
9f896c1249
commit
a1dc03a484
|
|
@ -197,7 +197,7 @@ egui frontend is a separate crate, so the UI can be swapped without touching the
|
|||
|
||||
GridCraft is in **alpha**: the core workflow works end to end, but depth, fidelity and file
|
||||
compatibility are still rough. It covers 89% of the Excel ribbon commands in our catalog
|
||||
([`docs/parity-checklist.md`](docs/parity-checklist.md)) and 501 of Excel's 523 worksheet functions
|
||||
([`docs/parity-checklist.md`](docs/parity-checklist.md)) and 505 of Excel's 523 worksheet functions
|
||||
([`docs/function-parity.md`](docs/function-parity.md)); weighted by what Excel users rely on, we
|
||||
estimate it is about 50% ready for real work. Next up: XLSX fidelity on real-world files, very large
|
||||
workbooks and multi-threaded recalc, chart depth, text in every script, and `.xls` import. Stage,
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
|
||||
**Stage: alpha** · next: beta, ~25 points of "ready for real work" and ~160–240 h away
|
||||
|
||||
> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-10 · **Change:** major (full re-measure against Excel for Mac 16.113.4; restructured to the craftrules progress-docs standard) · **Target:** Microsoft Excel (Microsoft 365)
|
||||
> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-11 · **Change:** minor (worksheet functions 505 / 523) · **Target:** Microsoft Excel (Microsoft 365)
|
||||
|
||||
GridCraft aims at full Microsoft Excel parity, and at being better in places: faster, open (XLSX
|
||||
is the native format), fully scriptable by agents (MCP, control channel, CLI), and on the web.
|
||||
|
|
@ -21,7 +21,7 @@ This page is the summary. The detail is in:
|
|||
|
||||
| Number | Value | Kind |
|
||||
|---|---|---|
|
||||
| **Feature breadth** (weighted) | **~75%** | estimated, anchored on two measurements: ribbon catalog 258 / 290 (89.0%), worksheet functions 501 / 523 (95.8%; 492 working, 94.1%) |
|
||||
| **Feature breadth** (weighted) | **~75%** | estimated, anchored on two measurements: ribbon catalog 258 / 290 (89.0%), worksheet functions 505 / 523 (96.6%; 496 working, 94.8%) |
|
||||
| **Ready for real work** | **~50%** | estimated from written weights (51.6); [target-app-parity.md](docs/target-app-parity.md) |
|
||||
| **Mainstream practitioner** | **~50%** | estimated: typical analyst/finance user, weekly features, × 0.90 interaction × 0.92 stability × 0.88 file exchange; [method](docs/target-app-parity.md#mainstream-practitioner) |
|
||||
| **Essentials user** | **~63%** | estimated: core features only, × 0.92 launch/stability × 0.95 clarity × 0.90 opening sent files; [method](docs/target-app-parity.md#essentials-user) |
|
||||
|
|
@ -74,7 +74,7 @@ collaboration, mobile, AI).
|
|||
| Area | Breadth | Ready | Hours | Doc |
|
||||
|---|---|---|---|---|
|
||||
| Formula language and calculation | ~92% | ~72% | 20–30 | [target-app-parity.md](docs/target-app-parity.md#feature-areas) |
|
||||
| Worksheet functions | 95.8% measured | ~82% | 18–30 | [function-parity.md](docs/function-parity.md) |
|
||||
| Worksheet functions | 96.6% measured | ~82% | 18–30 | [function-parity.md](docs/function-parity.md) |
|
||||
| Editing, navigation, clipboard, fill | ~90% | ~70% | 15–25 | [ui-parity.md](docs/ui-parity.md) |
|
||||
| Cell formatting, styles, conditional formatting | ~95% | ~80% | 8–14 | [target-app-parity.md](docs/target-app-parity.md#feature-areas) |
|
||||
| Sort, filter, tables, validation, outline | ~82% | ~70% | 10–16 | [target-app-parity.md](docs/target-app-parity.md#feature-areas) |
|
||||
|
|
@ -131,6 +131,7 @@ Ranked; estimates in Opus 5.5 agent-hours. Detail and the full beta-gate list in
|
|||
|
||||
| Date | What landed |
|
||||
|---|---|
|
||||
| 2026-10-11 | FORECAST.ETS, FORECAST.ETS.CONFINT, FORECAST.ETS.SEASONALITY, FORECAST.ETS.STAT: AAA exponential smoothing forecasts (#314) |
|
||||
| 2026-10-10 | Ribbon translated into Japanese, Chinese, Korean, Brazilian Portuguese and Russian with system-language default (#31, #104, #82); CJK/Thai/Hebrew font fallback (#38); clear messages for encrypted and `.xls` files (#17); smooth line charts (#62). Progress docs restructured to the craftrules standard; full re-measure (this page). Initial ribbon key tips (#43), in-place text box editing (#84), copy as HTML table (#36). ODS and XLSB data import (#100, #101); recalc linear in the number of range formulas (#66); RISC-V Linux build; Flatpak repository on Pages; web cell-commit trap fixed |
|
||||
| 2026-10-09 | Community fixes: spill range operator `A1#`, sheet-scoped names, protection refuses locked-cell edits, Insert/Delete Cells adjust references, `DATE(1900,2,29)`, SUMIF sizing, `ROUND` at 15 digits, `_xlpm.` LAMBDA parameters in XLSX, vertical scrollbar, system appearance, border previews; v0.4.0 |
|
||||
| 2026-10-08 | v0.2.0 and v0.3.0 releases; Flatpak, AppImage zsync, branded DMG; desktop log file; DirectX 12 default on Windows |
|
||||
|
|
@ -142,6 +143,7 @@ Ranked; estimates in Opus 5.5 agent-hours. Detail and the full beta-gate list in
|
|||
|
||||
| Date | Change | Summary |
|
||||
|---|---|---|
|
||||
| 2026-10-11 | minor | Worksheet functions 505 / 523 (FORECAST.ETS family); progress log row |
|
||||
| 2026-10-10 | minor | Readiness-by-audience table with hours to ~95% per audience; full number unchanged (additive weighted sum) |
|
||||
| 2026-10-10 | minor | Added Mainstream practitioner (~50%) and Essentials user (~63%); languages updated for the 10-10 merges (ribbon in ja, zh, ko, pt-BR, ru); localization 5%→10%; full number re-checked (51.6, unchanged) |
|
||||
| 2026-10-10 | minor | Checked against the alpha gate (six core workflows pass): stays alpha |
|
||||
|
|
|
|||
File diff suppressed because it is too large
Load Diff
|
|
@ -65,6 +65,7 @@ pub(crate) mod database;
|
|||
pub(crate) mod date;
|
||||
pub(crate) mod dynamic;
|
||||
pub(crate) mod engineering;
|
||||
pub(crate) mod ets;
|
||||
pub(crate) mod financial;
|
||||
pub(crate) mod info;
|
||||
pub(crate) mod lift;
|
||||
|
|
@ -168,6 +169,7 @@ fn registry() -> &'static (Vec<FnSpec>, HashMap<&'static str, usize>) {
|
|||
for list in [
|
||||
math::specs(),
|
||||
stat::specs(),
|
||||
ets::specs(),
|
||||
text::specs(),
|
||||
date::specs(),
|
||||
lookup::specs(),
|
||||
|
|
|
|||
|
|
@ -215,6 +215,9 @@ fn scalar_arg(name: &str, i: usize) -> bool {
|
|||
"FILTER" | "SORTBY" => i > 1,
|
||||
"SORT" | "UNIQUE" | "TAKE" | "DROP" | "CHOOSECOLS" | "CHOOSEROWS" | "TOROW" | "TOCOL" | "WRAPROWS" | "WRAPCOLS" | "EXPAND" => i != 0,
|
||||
"LINEST" | "LOGEST" | "TREND" | "GROWTH" => i > 1,
|
||||
"FORECAST" | "FORECAST.LINEAR" => i == 0,
|
||||
"FORECAST.ETS" | "FORECAST.ETS.CONFINT" => i != 1 && i != 2,
|
||||
"FORECAST.ETS.SEASONALITY" | "FORECAST.ETS.STAT" => i > 1,
|
||||
_ => true,
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -321,6 +321,7 @@ mod tests {
|
|||
#[test]
|
||||
fn functions() {
|
||||
assert_eq!(file_function_name("xlookup").as_deref(), Some("_xlfn.XLOOKUP"));
|
||||
assert_eq!(file_function_name("forecast.ets.confint").as_deref(), Some("_xlfn.FORECAST.ETS.CONFINT"));
|
||||
assert_eq!(file_function_name("FILTER").as_deref(), Some("_xlfn._xlws.FILTER"));
|
||||
assert_eq!(file_function_name("SUM"), None);
|
||||
assert_eq!(builtin_format(14), Some("m/d/yyyy"));
|
||||
|
|
|
|||
|
|
@ -257,6 +257,12 @@ fn implicit_intersection_metadata_respects_function_argument_context() {
|
|||
("LET(x,A1:A3,SUM(x*2))", true),
|
||||
("XLOOKUP(1,A1:A3,B1:B3)", false),
|
||||
("XLOOKUP(1,A1:A3,B1:C3)", true),
|
||||
("FORECAST.LINEAR(4,A1:A3,B1:B3)", false),
|
||||
("FORECAST.ETS(4,A1:A3,B1:B3,1,1,1)", false),
|
||||
("FORECAST.ETS(C1:C3,A1:A3,B1:B3)", true),
|
||||
("FORECAST.ETS.CONFINT(4,A1:A3,B1:B3,0.95)", false),
|
||||
("FORECAST.ETS.SEASONALITY(A1:A3,B1:B3)", false),
|
||||
("FORECAST.ETS.STAT(A1:A3,B1:B3,1)", false),
|
||||
],
|
||||
);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,6 +1,6 @@
|
|||
# Function parity: worksheet functions and formulas
|
||||
|
||||
> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-10 · **Change:** major (created; measured against Microsoft's published Excel function list) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
|
||||
> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-11 · **Change:** minor (FORECAST.ETS family added) · **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).
|
||||
|
|
@ -12,7 +12,7 @@ Excel's worksheet functions, category by category, against GridCraft's function
|
|||
them), plus 14 text functions the page lists under combined entries (FIND/FINDB, LEFT/LEFTB,
|
||||
LEN/LENB, MID/MIDB, REPLACE/REPLACEB, RIGHT/RIGHTB, SEARCH/SEARCHB), BETA.INV, and COPILOT and
|
||||
PY (Microsoft 365 functions not on that page when fetched).
|
||||
- **Ours (501):** every function spec in `crates/functions/src/*.rs` (`f!("NAME", …)`) plus the
|
||||
- **Ours (505):** every function spec in `crates/functions/src/*.rs` (`f!("NAME", …)`) plus the
|
||||
evaluator's special forms in `crates/calc/src/eval.rs` (`SPECIAL_FUNCTIONS`: IF, IFS, CHOOSE,
|
||||
OFFSET, INDIRECT, INDEX, SUBTOTAL, AGGREGATE, TEXT, LET, LAMBDA, MAP, REDUCE, SCAN, BYROW, BYCOL,
|
||||
MAKEARRAY…), excluding the test-only `ADD2`. Every one is an Excel name.
|
||||
|
|
@ -23,11 +23,11 @@ Excel's worksheet functions, category by category, against GridCraft's function
|
|||
|
||||
## Coverage
|
||||
|
||||
**Measured: 501 / 523 by name (95.8%); 492 / 523 working (94.1%).**
|
||||
**Measured: 505 / 523 by name (96.6%); 496 / 523 working (94.8%).**
|
||||
|
||||
| Category | Excel | Ours | Working | % working | Missing |
|
||||
|---|---|---|---|---|---|
|
||||
| Statistical | 111 | 107 | 107 | 96% | FORECAST.ETS, FORECAST.ETS.CONFINT, FORECAST.ETS.SEASONALITY, FORECAST.ETS.STAT |
|
||||
| Statistical | 111 | 111 | 111 | 100% | — |
|
||||
| Math and trigonometry | 80 | 79 | 79 | 99% | PERCENTOF |
|
||||
| Financial | 55 | 51 | 51 | 93% | ODDFPRICE, ODDFYIELD, ODDLPRICE, ODDLYIELD |
|
||||
| Engineering | 54 | 54 | 54 | 100% | — |
|
||||
|
|
@ -42,10 +42,10 @@ Excel's worksheet functions, category by category, against GridCraft's function
|
|||
| Web | 3 | 3 | 1 | 33% | (WEBSERVICE, FILTERXML are stubs; ENCODEURL works) |
|
||||
| Add-in and Automation | 3 | 0 | 0 | 0% | CALL, EUROCONVERT, REGISTER.ID |
|
||||
| AI and Python | 2 | 0 | 0 | 0% | COPILOT, PY |
|
||||
| **Total** | **523** | **501** | **492** | **94.1%** | 22 missing, 9 stubs |
|
||||
| **Total** | **523** | **505** | **496** | **94.8%** | 18 missing, 9 stubs |
|
||||
|
||||
By the Excel version that introduced them (working / total): before 2010 342 / 360, 2010
|
||||
56 / 56, 2013 49 / 51, 2016 1 / 5, 2019 6 / 6, 2021 11 / 11, 2024 22 / 23, Microsoft 365 5 / 11.
|
||||
56 / 56, 2013 49 / 51, 2016 5 / 5, 2019 6 / 6, 2021 11 / 11, 2024 22 / 23, Microsoft 365 5 / 11.
|
||||
Dynamic-array and LAMBDA-era functions (FILTER, SORT, UNIQUE, XLOOKUP, VSTACK, TAKE, GROUPBY,
|
||||
PIVOTBY, REGEXTEST…) are all present.
|
||||
|
||||
|
|
@ -53,7 +53,6 @@ PIVOTBY, REGEXTEST…) are all present.
|
|||
|
||||
| Function(s) | In scope? | Estimate | Note |
|
||||
|---|---|---|---|
|
||||
| FORECAST.ETS family (4) | yes | 4–6 h | AAA exponential smoothing with seasonality detection; needed for Forecast Sheet too |
|
||||
| ODDFPRICE, ODDFYIELD, ODDLPRICE, ODDLYIELD | yes | 2–4 h | Odd first/last period bond maths |
|
||||
| GETPIVOTDATA | yes | 2–3 h | Needs the pivot engine's result cache; also the "Generate GetPivotData" option |
|
||||
| TRIMRANGE, PERCENTOF, BAHTTEXT | yes | 1–2 h | TRIMRANGE also implies the `.:` trim-ref operators |
|
||||
|
|
@ -97,4 +96,5 @@ workbooks; results checked in as data, not Excel files) and fixing what it finds
|
|||
|
||||
| Date | Change | Summary |
|
||||
|---|---|---|
|
||||
| 2026-10-11 | minor | FORECAST.ETS, .CONFINT, .SEASONALITY, .STAT added (AAA exponential smoothing; Excel's optimiser is undocumented, so last digits on noisy data may differ): 505 / 523 by name, 496 working |
|
||||
| 2026-10-10 | major | Created: 501 / 523 by name, 492 working, per category, against Microsoft's published list |
|
||||
|
|
|
|||
|
|
@ -1,6 +1,6 @@
|
|||
# Gaps
|
||||
|
||||
> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-10 · **Change:** major (created from the full re-measure against Excel for Mac 16.113.4 and the issue tracker) · **Target:** Microsoft Excel (Microsoft 365)
|
||||
> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-11 · **Change:** minor (§13, §15: FORECAST.ETS family landed) · **Target:** Microsoft Excel (Microsoft 365)
|
||||
|
||||
Every known shortfall against Excel, one entry each, ranked by user impact (what blocks someone
|
||||
using GridCraft for real work first). This is the work list: pick from the top, check the open
|
||||
|
|
@ -98,15 +98,15 @@ No alpha blockers: every core workflow passes the [alpha gate](roadmap.md#alpha-
|
|||
data model (`data.fromWeb`, `data.relationships` missing). **Estimate:** 60–100 h.
|
||||
|
||||
### 13. Analysis tools: Solver, Analysis ToolPak, Forecast Sheet (F)
|
||||
- `data.solver`, `data.analysisToolPak`, `data.forecastSheet` missing; FORECAST.ETS family missing.
|
||||
**Estimate:** 22–35 h.
|
||||
- `data.solver`, `data.analysisToolPak`, `data.forecastSheet` missing (the FORECAST.ETS family the
|
||||
Forecast Sheet builds on is in). **Estimate:** 18–30 h.
|
||||
|
||||
### 14. Page Layout view and print polish (U, F)
|
||||
- No paper view with rulers and in-place header/footer editing; web print exports only (#141, PR
|
||||
#143). **Estimate:** 12–20 h.
|
||||
|
||||
### 15. Remaining functions and an oracle suite (F)
|
||||
- 22 missing, 9 stubs; no Excel-computed oracle corpus; #137, #138. **Estimate:** 18–30 h.
|
||||
- 18 missing, 9 stubs; no Excel-computed oracle corpus; #137, #138. **Estimate:** 18–30 h.
|
||||
[function-parity.md](function-parity.md)
|
||||
|
||||
### 16. Collaboration and review (F)
|
||||
|
|
@ -149,6 +149,7 @@ No alpha blockers: every core workflow passes the [alpha gate](roadmap.md#alpha-
|
|||
|
||||
| Date | Change | Summary |
|
||||
|---|---|---|
|
||||
| 2026-10-11 | minor | §13, §15: FORECAST.ETS family landed (#314) |
|
||||
| 2026-10-10 | minor | Updated for the 10-10 merges (#17, #31, #38, #62, #82, #104, #116) and the new chart resize bug (#190) |
|
||||
| 2026-10-10 | minor | Noted that no gap blocks the alpha gate |
|
||||
| 2026-10-10 | major | Created: 24 ranked gaps with evidence, from the full re-measure and the 60 open issues |
|
||||
|
|
|
|||
Loading…
Reference in New Issue