[Repo Assist] Monthly Activity 2026-03

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Activity for March 2026

Suggested Actions for Maintainer

Comprehensive list of all pending actions requiring maintainer attention:

• Review PR [Repo Assist] Add missing Stats/Series tests; fix duplicate project GUIDs in Deedle.sln #690: Add missing Stats/Series tests + fix duplicate project GUIDs in Deedle.sln — Review
• Review PR [Repo Assist] Perf: eliminate seq/ref overhead in Stats moving and expanding window helpers #683: Perf — eliminate seq/ref overhead in Stats moving/expanding window helpers — Review
• Review PR (new): Implement Frame.interleave — side-by-side frame combining with tuple column keys — Closes More merging frames - #187 — View open Repo Assist PRs
• Check comment Provide simpler-to-use extension methods for time series data #81: Repo Assist researched status of time-series extension methods after recent changes — View
• Check comment More merging frames - #187: Repo Assist implemented Frame.interleave — see new PR — View
• Check comment Improve docs, particularly for C# #308: Repo Assist summarised current state of C# API and improvements — View
• Check comment [Feature proposal] Variable multi key joining #509: Repo Assist summarised workarounds for non-index joins — View
• Close issue Sample code snippet and introduction for the fslab website #531: fslab website snippet added in 2021; docs now substantially improved — View
• Review issue [Repo Assist] Epic: Deedle.MicrosoftML integration package #676: MicrosoftML epic — future work remains — View

Future Work for Repo Assist

• docs/excel.fsx — Deedle.Excel documentation page (issue [Repo Assist] Documentation gaps: missing value handling, grouping, Math, Excel, performance benchmarks #684 medium priority)
• docs/interactive.fsx — Deedle.Interactive / .NET Interactive notebooks (issue [Repo Assist] Documentation gaps: missing value handling, grouping, Math, Excel, performance benchmarks #684 lower priority)
• C# API documentation page (issue [Repo Assist] Documentation gaps: missing value handling, grouping, Math, Excel, performance benchmarks #684 lower priority)
• Deedle.MicrosoftML: type-hint API, scripting helpers, docs page, NuGet packaging
• Benchmark suite: CI integration

Run History

2026-03-22 12:21 UTC — Run

• 🔧 Implemented Frame.interleave (Task 10) — Closes More merging frames - #187; 696/696 tests pass
• 💬 Commented on More merging frames - #187 linking to new PR

2026-03-22 00:54 UTC — Run

• 🧪 Created PR [Repo Assist] Add missing Stats/Series tests; fix duplicate project GUIDs in Deedle.sln #690: Add 7 tests for Stats.movingVariance, expandingCount, expandingSum, expandingVariance, Series.pairwise (697/697 tests pass)
• 🔧 Fixed duplicate project GUIDs in Deedle.sln (Deedle.Arrow / Deedle.MicrosoftML both had same GUID); added NestedProjects entries for Arrow and MicrosoftML projects

2026-03-21 14:01 UTC — Run

• 🔧 Created PR (docs): docs/math.fsx — comprehensive Deedle.Math documentation; revisions to all existing docs pages — Closes part of [Repo Assist] Documentation gaps: missing value handling, grouping, Math, Excel, performance benchmarks #684; 690/690 tests pass

2026-03-21 12:20 UTC — Run

• 🔧 Created PR [Repo Assist] Add missing value handling documentation page (docs/missing.fsx) #688: Add docs/missing.fsx — comprehensive missing value handling docs page — merged ✅

2026-03-21 10:39 UTC — Run

• 🔧 Created PR [Repo Assist] Add BenchmarkDotNet performance benchmark suite #687: Add BenchmarkDotNet benchmark suite — 41 benchmarks (20 frame + 21 series), converts performance.fsx and Performance.fs — merged ✅

2026-03-21 10:38 UTC — Run

• 💬 Commented on More merging frames - #187: researched Frame.interleave feature request — explained existing zip + expandAllCols workaround and offered to implement
• 💬 Commented on Provide simpler-to-use extension methods for time series data #81: researched status of time-series extension methods — documented what's in Stats/Deedle.Math, identified only gap is pairwise cross-volatility

2026-03-21 09:49 UTC — Run

• 🔧 Created PR [Repo Assist] Deedle.Arrow Part 3: Frame/Series module API, extended tests and documentation #685: Deedle.Arrow Part 3 — Frame/Series module API, 29 new tests (53 total), docs/arrow.fsx, docs/joining.fsx — merged ✅
• 📝 Created issue [Repo Assist] Documentation gaps: missing value handling, grouping, Math, Excel, performance benchmarks #684: Documentation gaps (missing values, Deedle.Math, Deedle.Excel, grouping, C# API)

2026-03-21 00:48 UTC — Run

• 🔧 Created PR [Repo Assist] Perf: eliminate seq/ref overhead in Stats moving and expanding window helpers #683: Perf — eliminate seq/ref overhead in movingWindowFn and expandingWindowFn in Stats module (685/685 tests pass)

2026-03-20 12:25 UTC — Run

• 🔧 Created PR [Repo Assist] Add Stats.corrMatrix and Stats.covMatrix for Frame #682: Add Stats.corrMatrix and Stats.covMatrix — pairwise correlation/covariance matrices — merged ✅

2026-03-20 01:01 UTC — Run

• 🔧 Created PR [Repo Assist] [Deedle.Arrow] Part 2: Feather aliases, Series helpers, UInt/Date types, C# extensions, row-key preservation #681: [Deedle.Arrow] Part 2 — Feather aliases, Series helpers, UInt/Date types, C# extensions, row-key preservation — merged ✅

2026-03-20 01:00 UTC — Run

• 🔧 Created PR [Repo Assist] Deedle.MicrosoftML: vector column support (VBuffer(float32) / VBuffer(float)) #680: Deedle.MicrosoftML vector column support (VBuffer(float32) / VBuffer(float)) — merged ✅

Earlier runs (2026-03-19)

• 🔧 Multiple PRs merged: [Repo Assist] Add SourceLink and deterministic build support — addresses #317 #660–[Repo Assist] Make Frame.joinOn parameter order consistent with Frame.join — closes #154 #663, [Repo Assist] Add Stats.movingMedian and Stats.expandingMedian #661 (movingMedian/expandingMedian), [Repo Assist] Add Deedle.MicrosoftML – ML.NET IDataView integration package #677 (MicrosoftML), [Repo Assist] [Deedle.Arrow] Part 1: Apache Arrow integration — Frame ↔ RecordBatch + IPC I/O #675 (Arrow Part 1), [Repo Assist] Add Deedle.Excel.Reader – cross-platform xlsx/xls reading #679 (Excel.Reader)
• 🔧 Created PRs: stack/unstack (Pandas-style stack/unstack #217), C# extensions (Sync & clean up the C# extension method API #207)
• 💬 Commented on Better output for delayed series #65, Sync & clean up the C# extension method API #207, Multi-level indices support in C# #213, Optimize df.Rows #216, Use SourceLink to enable debugging #317, Support for the Feather format #343, Import from xlsx #429, [Feature proposal] Variable multi key joining #509, Implement IDataView interface #563, [Repo Assist] [Deedle.Arrow] Part 2: Feather v2 alias, Series helpers, multi-batch hardening #674

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