aleleba/gridcraft
1
0
Fork 0
mirror of https://github.com/storytold/gridcraft.git synced 2026-10-31 14:17:12 -06:00
Code Issues Packages Projects Releases Wiki Activity

Merge PR #2980

Browse Source 
# Conflicts:
#	docs/function-parity.md
This commit is contained in:
Brandon Thomas
2026-10-31 10:17:09 -04:00
parent 8069ad33ef 3de6cb1a3d
commit 59fd17ae56
3 changed files with 23 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/function-parity.md
+2 -1
View File
@@ -1,6 +1,6 @@
# Function parity: worksheet functions and formulas
> **Last reviewed:** 2026-10-31 · **Last updated:** 2026-10-31 · **Change:** minor (edge cases matched to Excel: base conversions, BITLSHIFT/BITRSHIFT, UNICHAR noncharacters, UPPER/LOWER/PROPER casing, FIXED/DOLLAR output, F/T/GAMMA/WEIBULL/BETA distributions, BINOM trial cap, HARMEAN; earlier: function edge-case parity row; earlier: function edge-case parity row; earlier: ECMA.CEILING listed with USDOLLAR as not on Microsoft's list; earlier: IMSQRT reproduces the stray real part Excel gives for negative reals) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
> **Last reviewed:** 2026-10-31 · **Last updated:** 2026-10-31 · **Change:** minor (edge cases matched to Excel: base conversions, BITLSHIFT/BITRSHIFT, UNICHAR noncharacters, UPPER/LOWER/PROPER casing, FIXED/DOLLAR output, F/T/GAMMA/WEIBULL/BETA distributions, BINOM trial cap, HARMEAN; earlier: function edge-case parity row; earlier: function edge-case parity row; earlier: function edge-case parity row; earlier: ECMA.CEILING listed with USDOLLAR as not on Microsoft's list; earlier: IMSQRT reproduces the stray real part Excel gives for negative reals) · **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).
@@ -93,6 +93,7 @@ This improves series preparation; it does not change the model-fitting or season
| 15-significant-digit comparison semantics | done (#57): `=0.1+0.2=0.3` is TRUE, and MATCH and COUNTIF compare the same way. Arithmetic keeps full precision, as Excel does — `=(0.1+0.2)-0.3` is 5.55E-17 |
| IMSQRT and the other IM* functions against Excel's text | IMSQRT follows Excel's polar route, so a negative real gives Excel's stray real part: `IMSQRT("-4")` is `1.22514845490862E-16+2i` (checked in Excel 16.0 on 79 inputs). Differences kept: IMSQRT of a number with a part above about 1E154 or below about 1E-155 gives the exact root (Excel gives `#NUM!` or 0); IMPOWER, IMEXP, IMSIN, IMCOS, IMSINH and IMCOSH keep exact results where Excel shows the same kind of noise (`IMPOWER("-4",2)` is `16-3.92047505570758E-15i`) or different trailing digits near multiples of pi/2; IMCSC and IMCSCH differ by one unit in the 15th digit; IMARGUMENT returns 16–17 digits where Excel returns 15; the text of IM* and COMPLEX results differs for some magnitudes (Excel writes `COMPLEX(1E-10,1)` as `0.0000000001+i` but `COMPLEX(0.000000123456789012345,1)` as `1.23456789012345E-07+i`, and an integer past 15 digits rounded and zero-padded) |
| MOD quotient limit | done: Excel 16.0 returns `#NUM!` when `ABS(number/divisor) >= 1.1259E12`; lower quotients retain the remainder |
| PERCENTRANK significance and precision | done: Excel 16.0 returns `#DIV/0!` from significance 309, and rounds to 15 significant digits for significance 15–308 |
| External workbook references (`[Book.xlsx]Sheet1!A1`) | parsed; links dropped on open, no update |
| Localized function names and `;` separators | **missing** (#45); en-US only |
| Long flat operator chains (`=A1+A2+…`, `-`, `*`, `/`, `^`, `&`, comparisons) | done: no operand limit below Excel's 8,192-character formula limit (Excel, observed: `=1+1+…` with 4,096 operands is exactly 8,192 characters with the `=` and calculates; one more character is refused). Evaluated (#484), printed (#628), stored, copied, adjusted, saved and reopened without recursing once per operand, on a 1 MiB stack (#916); written to XLSX as plain formulas, not dynamic arrays; Spanish entry accepts them |