Segmented Linear Fit Encoder

Qt 6 + C++ desktop application for building a piecewise linear approximation from measured data.

The current app is shipped as Piecewise Linear Fit Studio and supports:

• CSV import
• manual point generation
• editable point tables
• piecewise linear analysis
• residual review charts
• code export for PLC, Python, C++, JavaScript, Java, and C#

Project Flow

flowchart LR
    A[CSV or Manual Input] --> B[PointTableModel]
    B --> C[SegmentFitService]
    C --> D[Segment results]
    D --> E[Charts in QML]
    D --> F[CodeExportService]
    F --> G[PLC and code output]

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Documentation

Full project documentation is available in:

• docs/index.md for the main documentation home

Serve the docs locally with:

pip install -r requirements-docs.txt
python -m mkdocs serve

Mermaid diagrams are already enabled in the docs site through the MkDocs configuration.

It covers:

• architecture
• backend file reference
• QML file reference
• data flow
• segmentation algorithm
• mathematical background
• chart generation
• export behavior
• relationship with the legacy notebook

Screenshots

The most important views are shown below.

For the full screenshot gallery, see docs/screenshots.md.

CSV Import

Piecewise Fit Results

Code Export

Open In Qt Creator

Open CMakeLists.txt, not .pro or .pyproject.

Build On Windows With Qt

C:\Qt\6.10.2\llvm-mingw_64\bin\qt-cmake.bat -S . -B build-cpp-qt -G Ninja -DCMAKE_MAKE_PROGRAM=C:/Qt/Tools/Ninja/ninja.exe -DCMAKE_CXX_COMPILER=C:/Qt/Tools/llvm-mingw1706_64/bin/clang++.exe
C:\Qt\Tools\Ninja\ninja.exe -C build-cpp-qt
C:\Qt\6.10.2\llvm-mingw_64\bin\windeployqt.exe --qmldir qml build-cpp-qt\piecewise-linear-fit.exe

Expected executable:

• build-cpp-qt/piecewise-linear-fit.exe

Repository Layout

• src/: C++ backend
• qml/: Qt Quick UI
• files/: sample CSV files and the legacy notebook
• docs/: project documentation

Sample Files

• files/data1_length.csv
• files/data2_length.csv
• files/segmented_linear_fit.ipynb