Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

1.17.0 - (2026-05-25)

🕯️ In memory of Cleve Moler (1939–2026)

This release is dedicated to the memory of Cleve Moler, creator of MATLAB and a towering figure in numerical computing. His vision of making linear algebra accessible to engineers and scientists changed the way the world writes scientific software and inspired every project that followed in his footsteps, including Nelson. We are grateful for the path he blazed.

Added

• function argument validation using arguments ... end blocks

  • Support for validation functions (e.g., mustBeNumeric, mustBeMember)
  • Default values for optional positional and name-value arguments
  • Separate validation blocks for input and output arguments
  • Improved error messages for invalid function arguments

• Debugger Support

  • Full breakpoint management with commands: dbstop, dbstep, dbcont, dbquit, dbclear, dbdown, dbup, dbstatus.
  • Support for setting breakpoints at specific files, functions, and lines.
  • Conditional breakpoints and hit-count breakpoints (if applicable).

• Interactive Debugging in Text Editor

  • Real-time feedback on breakpoints directly within the editor.
  • Inline variable inspection while stepping through code.
  • Highlighting of the current execution line.

• Step Execution Controls

  • Step Into: move into function calls.
  • Step Over: execute functions without entering them.
  • Continue: resume execution until the next breakpoint.

• Stack Inspection & Variable Evaluation

  • Examine the call stack during debugging with dbup and dbdown.
  • Evaluate and modify variables in the current workspace.
  • Inspect function arguments and local variables.

• Enhanced Debugging Experience

  • Integration with the command-line interface and editor interface.
  • Improved visibility of function contexts and nested calls.

• Added support for multi-line comments in the interpreter, editor, debugger, and headcomments.

• interp2, interp3, interpn: interpolation functions

• regexp, regexpi, regexprep, regextranslate: regexp functions added.

• #309: erf, erfc, erfcinv, erfcx, erfinv error functions.

• #1289: isbetween, allbetween, mustBeBetween functions.

• tiledlayout, nexttile, tilenum, tilerowcol layout management.

• #813: findobj Find graphics objects with specific properties.

• contourf, contourc, Filled contour plot of matrix.

• Dedicated Windows Terminal profile installed for the application.

• help engine extending to manage subchapters.

• xmldoclinkchecker Checks unresolved cross-references in Nelson help XML files.

• MacOS packaging as dmg installer.

• Qt 6.11.0 support.

• Full CMake configuration and build system for Visual Studio (x64, Win32, ARM64).

• Ubuntu 26.04 ready.

• Fedora 44 ready.

Changed

• Reduced interpreter overhead in tight loops.
• Internal tooling refactored: nodejs and python tools for formatting and version updates replaced with Rust-based tools.
• CMake factorized.
• Innosetup installer modernized.
• fmtlib 12.1

Fixed

• #1585: Memory leak during scalar assignments in tight/nested loops after scalar inline-data optimization.
• #1567: UTF-16LE output despite encoding=‘UTF-8’ in fprintf builtin (Windows).
• #1564: Regression: modifying copy unexpectedly alters original array.
• #1550: getpid(‘available’) did not work as expected.
• #1547: Parsing of ~= operator with spaces was not working correctly, causing it to be misinterpreted as a matrix row separator.
• unresolved cross-references in Nelson help XML files.
• memory leak in uicontrol.

1.16.0 - (2025-12-27)

Added

• Windows ARM64 support: build and installer available.
• onCleanup: Execute code during function shutdown.
• #188 audiorecorder: Record audio.
• getaudiodata: Retrieve recorded audio as a numeric array.
• isrecording: Check if audio recording is in progress.
• record: Record audio to an audiorecorder object.
• recordblocking: Record audio and block until completion.
• getplayer: Create an associated audioplayer object.
• TimerFcn, StartFcn, StopFcn callbacks for audioplayer and audiorecorder.
• rms: Compute root mean square of array elements.
• daspect: Set data unit length along each axis.
• pbaspect: Set relative axis lengths.

Changed

• Advanced terminal: linenoise replaced by replxx for improved line editing.
• Autocomplete: Upgraded functionality in advanced command-line terminal.
• Axis handling: Enhanced axis limit normalization and improved DataAspectRatio.

Fixed

• #1494: In advanced CLI mode, pasting long lines no longer causes character duplication.
• #1493: doc function works again on Nelson Cloud (regression in 1.15.0).
• #1492: Temporary message removed when generating toolbox help.
• BLAS/OpenBLAS detection improved in example run([modulepath('dynamic_link'), '/examples/call_fortran.m']) on some Linux systems.
• imresize: Now supports scalar string arrays as input arguments.
• #1505: Updated CMake to 4.2 and ICU to 78.1 on Windows

1.15.0 - (2025-11-21)

Starting with v1.15, Nelson for Windows is officially signed with a Certum-issued code-signing certificate. This is a major security milestone, ensuring the authenticity and integrity of Nelson’s Windows releases.

Nelson remains a non-profit, community-driven project. The certificate represents a significant cost for a volunteer effort - any donation to help cover it is deeply appreciated.

Added

• Pair Name/Value argument syntax for plotting (e.g. plot(x, y, '--rs', LineWidth=2, MarkerEdgeColor='k')).
• Support for ignored outputs in assignments (e.g. [~, V, ~] = svd(A)).
• New random engines: simdTwister, combRecursive, philox, threefry.
• randi: uniform random integers.
• sprand, sprandn: sparse random matrices (uniform and normal).
• mink, maxk: k smallest / largest elements.
• subspace: angle/distance between column spaces.
• std: standard deviation.
• findpeaks: local maxima detection.
• downsample: integer-factor resampling.
• imresize: image resizing (scale or target size).
• clabel: contour labeling.
• Extended colormap placement locations: north, south, east, west and their outside variants.
• Variable Editor: redesigned UI with improved performance, structured/table/array support and copy-paste compatibility with common spreadsheet apps.
• Continuation prompt: context-aware interactive prompts.
• missing: create missing values for arrays and tables.
• renameStructField: rename structure fields.
• convertStringToCharArgs: convert string/cell-of-strings to char-args.
• jsondecode(..., '-file'): decode JSON directly from a file.
• tdigest: t-digest quantile estimation.
• pascal and gallery helper matrices.
• crc32 builtin: compute CRC32 of file/string.
• markdown: output mode option (secure | advanced).
• fwrite: also return written byte count as a second output.
• loadenv: load environment variables from .env or text files.
• help: function help available in Command Window.
• consolebox: show/hide Windows terminal for Nelson session.
• CI / platform additions: macOS Tahoe 26, Fedora 43, Python 3.14, Visual Studio 2026 support.

Changed

• svd: optimized for multithreading and large matrices.
• Help framework: reworked for performance and maintainability (multithreaded builds, improved search, unified stylesheet, XSLT, LaTeX formula support, French translations, removed Qt help dependency, secure links).
• jsondecode: integrated simdjson for faster parsing.
• fileread: improved performance for large files.
• fwrite: returns character count for character data.
• i18nExtractor, browser variable and other internals: refactored for speed and reliability.
• Third-party library updates on Windows (HDF5, zlib, matio) and Qt upgraded to 6.10.0 (Win x64).
• Benchmarks and xmldocchecker: updated/improved.
• External packages: installing a package switches to local embedded help; packages must be rebuilt for the new help format.
• Removed several Boost dependencies to simplify builds.
• Private functions no longer appear in autocompletion.
• GitHub CI: MacOS Ventura replaced by MacOS 15 Intel.
• Markdown renderer switched to cmark.
• #1458 Optional support for Eigen 5.0.0 when detected.
• #1465 Test file renaming to bug_github_issue_XXX.

Fixed

• ans variable: created only for expressions.
• jsondecode: fixed parsing of arrays that contain empty arrays.
• fwrite: fixed behavior when precision is unspecified.
• eye: handled no-argument call correctly.
• #2 Sparse type insertion & extraction extended and corrected.
• Julia engine: compatibility with Julia 1.12.0

1.14.0 - (2025-05-30)

Added

• New functions:
  • imrotate: Rotate an image.
  • scatter3: 3D scatter plot.
  • colormaplist: List available colormaps.
  • arrayfun: Apply a function to each element of an array.
  • nelsonappid: Return the Nelson application ID.
• New colormaps:
  • nebula, flag, prism.
• New properties:
  • WindowState for Figure objects.
  • Units for UIControl objects.
  • DefaultFigureAlphamap, DefaultFigureColormap as root properties.
• Support for nix develop, providing a reproducible Bash shell preconfigured with Nelson’s build environment. See BUILDING.md for details.
• A justfile to streamline and standardize the build process across platforms.
• Support for:
  • Fedora 42.
  • Flatpak package distribution.

Changed

• scatter improvements:
  • Now returns a scatter graphic object (instead of a line graphic object).
  • Improved rendering precision for scatter symbols (pixel-perfect accuracy).
  • Supports alpha channel (transparency).
• scatter3 now supports alpha channel.
• spy now uses scatter instead of plot for better accuracy.
• Colormap handling updated to use the new DefaultFigureColormap root property.
• Improved error message when parsing invalid anonymous functions.
• Boost:
  • Now supports Boost 1.88 (#1378).
  • Minimum required version set to 1.71.
• Updated dependencies and platform support:
  • Qt 6.9.0 on Windows x64.
  • JSON for Modern C++ updated to v3.12.0.
  • Mozilla CA certificates updated (Tue May 20 03:12:02 2025 GMT).

Fixed

• #1413: axes function did not properly manage figure objects.

Technical Improvements

• Application ID changed to io.github.nelson_lang.Nelson.
• GitHub CI:
  • Now uses Windows 2025 for Windows builds.
  • Major workflow rework for improved reliability and maintainability.
• Build system:
  • Updated to latest Prettier version.
  • Added use of shared library suffix via a CMake macro.
  • Included CPU target name in Linux packages.
  • Minimized dependencies on SLICOT.

1.13.0 - (2025-03-29)

This release introduces performance improvements and new graphical capabilities while deprecating support for 32-bit Windows versions.

Changed

• Windows x64 Compatibility: Now requires the AVX2 instruction set.

• Windows 32-bit Support: Official distribution of 32-bit Windows binary versions has been discontinued.

• macOS Optimization: Builds for macOS with M-series chips now leverage native optimizations for improved performance.

• Plot Performance: Optimized plot and plot3 functions for increased speed. Example:

  tic(); plot(rand(300,300), rand(300,300)); toc();
  

• Dependencies Updated:

  • Upgraded fmtlib to version 11.1.3.
  • Intel Math Kernel Library (MKL) updated to 2025.0.1 on Windows.

• Internal Enhancements:

  • OpenMP multithreading macros have been reworked for better efficiency.

• SLICOT module incorporates SLICOT library 5.9, which is distributed under the BSD-3-Clause license.

  • SLICOT module available on all platforms by default.

• python 3.13.2 embedded on Windows

Added

• Double Buffering for Plots:

  • Implemented double buffering to enhance the smoothness and responsiveness of graphical plots.
  • Significantly reduces flickering during graphical updates.

• New Graphics Functions:

  • getframe: Captures an axes or figure as a movie frame.
  • movie: Plays recorded movie frames.
  • im2frame: Converts an image to a movie frame.
  • frame2im: Returns image data associated with a movie frame.
  • DevicePixelRatio: New figure property to handle display scaling.

• Graphics IO module:

  • imwrite: create gif animations.
  • imwrite, imread: pcx, tiff file formats managed.
  • imformats: Manage image file format registry.

• New Example:

  • Added an example for connecting ollama with Nelson:

    edit([modulepath('webtools'), '/examples/ollama/readme.md'])
    

• CMake Enhancement:

  • Introduced ENABLE_AVX2 CMake option for systems that support AVX2.
  • CMake dependencies reworked.

Fixed

• MacOs: Default terminal did not use monospaced font.

• Some warnings detected with PVS-studio

1.12.0 (2025-02-16)

Added

• Julia interface (part 1):

  • jlenv: Change default environment of Julia interpreter.
  • jlrun: Run Julia statements from Nelson.
  • jlrunfile: Run Julia file from Nelson.
  • Major types conversions are available.
  • CMake: Optional Julia engine detection.

• bar, scatter manage color name and short colorname.

• Github CI Ubuntu 24.04 arm64 (Cobalt 100 processor).

• Github CI Snapcraft build amd64 and arm64.

• Snapcraft arm64.

Changed

• Completion .m files allows execution without extension.
• #1342 Github CI - Ubuntu-20.04 hosted runner image removed.

Fixed

• #1346 [display] integer in cell are displayed as double and not as integer.

1.11.0 (2025-01-11)

Added

• #1321 mustBeSparse validator function.
• #1322 cmdsep: Command separator for current operating system.
• urlencode: Replace special characters in URLs with escape characters.
• docroot: Utility to retrieve or define the root directory of Nelson Help.
• ismodule: second input argument isprotected added.
• editor('editor_command', cmd) allows to change text editor in Nelson (for example: VS Code).
• NELSON_RUNTIME_PATH environment variable added by installer on Windows.
• --vscode command line argument added.
• NixOS 24.11 packaging (see BUILDING_Linux.md).

Changed

• Help Center: Access documentation in your system’s web browser. Previously, the documentation was opened in the embedded Help browser.
• CA certificate store update.
• fmt library dependency updated.
• BS::threadpool library dependency updated.
• Advanced terminal updated (common for all platforms without GUI, auto completion, search history).
• Python 3.13.1 supported.

Fixed

• #1324 Cell display could not be interrupted.

1.10.0 (2024-12-14)

Added

• detectImportOptions: Generate import options from the file’s content.
• readtable: Read table from file.
• writetable: Write table to file.
• readcell: Read cell array from file.
• writecell: write cell array to file.
• readmatrix: read matrix from file.
• writematrix: write matrix to file.
• csvread: Read comma-separated value (CSV) file.
• csvwrite: Write comma-separated value (CSV) file.
• dlmread: Read ASCII-delimited file of numeric data into matrix.
• realmin: Smallest normalized floating-point number.
• #1288 mustBeMatrix, mustBeRow, mustBeColumn validator functions.
• join: Combine strings.
• #1292 Large Table Display.
• #1290 VariableTypes property for table: Specify the data types of table in Nelson.
• hour, minute, second component of input date and time.

Changed

• narginchk, nargoutchk support for check only minimun arguments narginchk(3, Inf).
• Fedora 41 CI
• title: Visible property is inherited from the parent if not explicitly defined.
• i18n: migration PO files to JSON.
• dlmwrite: rework the function to be more fast and robust.
• strjust: rework the function to be more fast and robust.
• datenum: support ‘’ as format for compatibility.

Fixed

• #1303 datevec result must be normalized.
• #1297 some features have no help files.
• #1276 micromamba macos build.

1.9.0 (2024-10-26)

Added

• Table direct computation:

  • unary functions: abs, acos, acosh, acot, acotd, acoth, acsc, acscd, acsch, asec, asecd, asech, asin, asind, asinh, atan, atand, atanh, ceil, cosd, cosh, cospi, cot, cotd, coth, csc, cscd, csch, exp, fix, floor, log, log10, log1p, log2, nextpow2, round, sec, secd, sech, sin, sind, sinh, sinpi, sqrt, tan, tand, tanh, var, acosd, not.
  • binary functions: plus, minus, times, eq, ge, gt, le, ne, lt, rdivide, rem, power, pow2, or, mod, ldivide.

• end magic keyword can be overloaded for classes (applied to table class).

• #1250 head, tail functions for table and array.

• #1248 removevars, renamevars functions for table.

Changed

• #1259 Add macOS Sequoia and remove macOS Monterey CI support.
• Qt 6.8 LTS support (used on Windows 64 bits binary).
• Python 3.13.0 on Windows.
• Boost 1.86 on Windows.

1.8.0 (2024-10-04)

Added

• table Data Type:

  • Introduced the table data type, offering enhanced functionality for structured data manipulation.

  • Overloaded methods specific to the table data type:

    • disp, display for table display.
    • horzcat, vertcat for horizontal and vertical concatenation.
    • isempty to check if the table is empty.
    • isequal, isequalto for table comparison.
    • properties for accessing table metadata.
    • subsasgn for subscripted assignment.
    • subsref for subscripted referencing.

  • Conversion functions added:

    • array2table: Convert an array to a table.
    • cell2table: Convert a cell array to a table.
    • struct2table: Convert a structure to a table.
    • table2array: Convert a table to an array.
    • table2cell: Convert a table to a cell array.
    • table2struct: Convert a table to a structure.

  • Utility functions introduced:

    • width: Retrieve the number of columns in the table
    • height: Retrieve the number of rows in the table
    • istable: Check if a variable is of the table data type

• Resize - Resize figure property.

• #36 datenum format compatibility extended.

• #37 datestr Convert date and time to string format.

Changed

• CodeQL Github action updated.

Fixed

• fix ‘units’ refresh for ‘axes’ object.

1.7.0 (2024-08-28)

Added

• uicontrol Create user interface control (button, slider, edit, list box, etc.).
• waitfor Block execution and wait for condition.
• waitforbuttonpress — Wait for click or key press.
• im2double — Convert image to double.
• CloseRequestFcn — Close request callback for figure.
• CreateFcn — Create callback for all graphic objects.
• DeleteFcn — Delete callback for all graphic objects.
• BusyAction — Busy action for all graphic objects.
• Interruptible — Interruptible property for all graphic objects.
• BeingDeleted — Being deleted property for all graphic objects.
• KeyPressFcn, KeyReleaseFcn, ButtonDownFcn properties for figure.

Changed

• Refactor the internal implementation of the ‘system’ built-in function.

• Python 3.12.5 on Windows.

1.6.0 (2024-06-29)

Added

• unique: Unique values.
• ndgrid: Rectangular grid in N-D space.
• nthroot: Real nth root of real numbers.
• allfinite: Check if all array elements are finite.
• j as imaginary unit number is also supported. example 3+2j equivalent to 3+2i.
• FollowLocation option for weboptions
• oneAPI Threading Building Blocks optional dependency.
• Ubuntu 24.04 debian package.
• Ubuntu 24.04 CI

Changed

• sort: speed optimization.

• Windows dependencies updated and rebuild with minimal dependencies:

  • Qt 6.7.1,
  • Visual C++ 2022 Redistributable v14.40.33810.00,
  • boost 1.85,
  • Python 3.12.4,
  • Intel Math Kernel Library 2024.1.1,
  • Intel runtime,
  • SLICOT,
  • gettext 0.22.5,
  • cmake 3.30.0 rc3,
  • libsndfile 1.2.2,
  • portaudio 19.7.5,
  • taglib 2.0,
  • libzip1 1.3.1,
  • libcurl 8.8.0,
  • icu4c 74.2,
  • libffi 3.4.6,
  • libxml2 2.11.7

• Unicode® Standard, Version 15.1 support

• simdutf 5.2.8

• fast_float 6.1.1

• dtl 1.2.0

Fixed

• #1210 bode did not unwrap phase.
• #1206 balance yields wrong Transformation Matrix.
• #1205 diag may return wrong sub-diagonals.
• #1202 buildhelpmd does not generate SUMMARY as expected.
• #1201 Matrix Exponential expm might give wrong results.
• #1200 Matrix Parsing/Evaluation trouble.

1.5.0 (2024-05-31)

Added

• dictionary data type.

  • dictionary: Object that maps unique keys to values.
  • configureDictionary: Create dictionary with specified key and value types.
  • insert: Add entries to a dictionary.
  • lookup: Find value in dictionary by key.
  • remove: Remove dictionary entries.
  • entries: Key-value pairs of dictionary.
  • keys: Keys of dictionary.
  • values: Values of dictionary.
  • types: Types of dictionary keys and values.
  • numEntries: Number of key-value pairs in dictionary.
  • isConfigured: Determine if dictionary has types assigned to keys and values.
  • isKey: Determine if dictionary contains key.
  • keyHash: Generate hash code for dictionary key.
  • keyMatch: Determine if two dictionary keys are the same.

• bernsteinMatrix: Bernstein matrix.

• orderedfields: Order fields of structure array.

• Python interface (part 3):

  • #1160 Python operators in Nelson.
  • keyHash, keyMatch for python objects.
  • isa builtin support python types.
  • python dictionary to Nelson dictionary dictionary(pyDict)
  • conversion dictionary to python dictionary.

Changed

• help files generated sorted by name on all platforms.
• on windows, Qt libraries used are in debug mode.

Fixed

• #1195 strcmp({'a'},["a"]) did not return expected value.

1.4.0 (2024-04-27)

Added

• Python interface (part 2):

  • #1168 Run Python script file from Nelson.
  • #1141 Help about Managing Data between Python and Nelson.
  • #1149 python bytes, and bytearray types were not managed.
  • #1163 pyenv searchs python by version on Windows.
  • #1164 Embed python distribution on Windows.
  • #1167 Help about how to install Python package from Nelson.
  • numpy types support if numpy available.
  • pyenv: can use environment variables to set values.

• getenv: Retrieve the values of several environment variables.

• pyrun: Python code object allowed as first input argument.

• nelson --without_python starts nelson without python engine.

• skip_testsuite: allows to skip test suite dynamically on condition.

Changed

• Allow to call method of a variable of CLASS/HANDLE type like a function (currently, only plugged for python subtype).
• #1142 Github Actions updated.
• #1157 Qt 6.7 support (used on Windows 64 bits binary).
• copyfile, isfile, isdir, mkdir allow string array type as input.
• warning about ‘Matrix is singular to working precision’ for inv matrix.
• tests webtools skipped if connection fails or not available.

Fixed

• #1144 test_run markdown help file had a typo.
• #1143 Linux Snapcraft version did not allow to use python.
• #1148 pyrun(‘print(A)’,‘A’,‘A’,string(NaN)) did not return expected value.
• single(int64([1 2; 3 4])) returned a wrong value.
• py.tuple, py.list compatibility increased.
• pyenv did not manage python’s path with space on Windows.
• Matio 1.5.27 compatibility on ArchLinux.
• Ubuntu 24.04 LTS support.
• #1178 Fedora 40 support (CI).
• #1134 [CI] MacOS X Ventura restored.

1.3.0 (2024-03-30)

Added

• Python interface (part 1):

  • CMake: Optional Python3 detection.
  • pyenv Change default environment of Python interpreter.
  • pyrun Run Python statements from Nelson.
  • Major types conversions are compatible (numpy in the next upcoming version).

• ArchLinux packaging (https://aur.archlinux.org/packages/nelson-git).

• contour Contour plot of matrix.

• contour3 3-D contour plot.

• shiftdim Shift array dimensions.

• xcorr2 2-D cross-correlation.

• deconv Deconvolution and polynomial division.

• vecnorm Vector-wise norm.

• normpdf Normal probability density function.

• #310 gammaln Logarithm of gamma function.

• #1112 gradient Numerical gradient.

• #1126 isspace Determine which characters are space characters.

Changed

• #1110 Eigen master branch (352ede96e4c331daae4e1be9a5f3f50fff951b8d) ready to use.
• #1134 [CI] MacOS X Ventura disabled (Install dependencies fails)
• struct supports scalar string array as field name.

Fixed

• #1110 add help about build and use C/C++ on fly.
• #1124 unexpected result from long statements on Multiple Lines.
• #1127 Nelson could crash if an mxn characters is displayed in the variable browser.
• #1125 Unsupported colon operator with char operands.
• Missing ‘zoom in’, ‘zoom out’ icons for help viewer in linux package.
• gcd without argument returned wrong error message.
• #1133 [CI] [ARCH LINUX] Warning about MPI.

1.2.0 (2024-02-25)

Added

• Recursive completion on Graphic handle, struct, handle, class (properties, methods).
• Adding links between documents about mex and supported compilers.
• GitHub CI for macOS Sonoma (Apple Silicon) support.
• Export to ... context menu for console and text editor as pdf.
• CTRL + Mouse wheel or CTRL + +/- to zoom in/out on console, editor, help.
• Toolbar for figure with print, zoom in, zoom out, rotation, pan, restore axes.
• zoom , pan , rotate3d functions.
• MenuBar, ToolBar figure properties.
• Window menu on graphic window, list all others available windows.
• feature builtin (undocument features, debug, tests, …) content can change with next releases.
• GridAlpha, GridColor, View properties for Axes.
• CTRL+C in help viewer, copy selected text.
• checkupdate function and check update menu.
• isScalarStringArray iinternal API C++ method.

Changed

• Clicking on an axis automatically sets it as the current axes object.
• Clicking on an figure automatically sets it as the current figure object.
• saveas exports the figure as a PDF page with centered alignment.
• Default color of grid for axes.
• Default figure size updated.
• Default MarkerFaceColor value for compatibility.
• view function returns azimuth and elevation values.
• Camera view reworked.
• Minimal screen resolution supported 800x600.

Fixed

• Change directory with file browser line editor did not work as expected.
• Template to create a function with file browser was wrong.
• Do not allow to select multiple variable in workspace browser.
• File browser checks if files with the extension “.m” have a valid name before enable ‘run’ context menu.
• Paste in editor with multiple tab.
• Starting the Nelson desktop was taking longer than necessary.

1.1.0 (2024-01-29)

Added

• Nelson Desktop environment: file browser, command history, workspace browser, desktop layout.
• #1074 Roadmap v2.0.0
• #1044: LU matrix factorization.
• #1080 LineStyle, LineWidth properties were not implemented for surface objects.
• sky, abyss colormaps.

1.0.0 (2024-01-04)

Nelson 1.0.0 has been released.

Nelson is an interactive, fully functional environment for engineering and scientific applications. It implements a matrix-driven language (which is largely compatible with MATLAB and GNU Octave), with advanced features such as 2-D 3-D plotting, image manipulation and viewing, a codeless interface to external C/C++/FORTRAN libraries, native support for various C types, and a host of other features.

Features

• Types managed by Nelson:

  • double and double complex: scalar, vector, matrix 2D, N dimensions array, sparse matrix.
  • single and single complex: scalar, vector, matrix 2D, N dimensions array, sparse matrix.
  • logical: scalar, vector, matrix 2D, N dimensions array, sparse matrix.
  • character array (UNICODE supported).
  • string array (UNICODE supported).
  • integers 8, 16, 32, 64 signed and unsigned: scalar, vector, matrix 2D, N dimensions array.
  • handle objects.
  • anonymous functions,
  • all types can be overloaded.

• OpenMP and SIMD extensions used.

• 2D and 3D plotting with high-level plot commands.

• Parallel Computing Module.

• Fast Fourrier Transformation functions based on FFTW and MKL wrapper.

• SLICOT (Subroutine Library in Systems and Control Theory) interfaces (optional).

• Control System module.

• Message Passing Interface (MPI): functions for parallel computing.

• JSON decode/encode data support.

• HDF5 high-level functions I/O,

• HDF5 used as default data file format (.nh5) load/save workspace,

• MAT-file compatible load/save workspace,

• Foreign Function Interface C/Fortran.

• Interfacing C/C++ or Fortran with Nelson (build and load external code on the fly).

• MEX C API compatibility.

• Nelson Engine API for C (compatible with MEX Engine). Call Nelson from your C code as engine.

• RESTful API web service.

• Inter-process communication between Nelson’s process.

• The QML engine enables nelson programs to display and manipulate graphical content using Qt’s QML framework.

• Component Object Model (COM) client interface: binary-interface standard for software components on Windows.

• Write/Read xlsx files on Windows using COM.

• Embedded Nelson code editor.

• Help engine:

  Generate help files using Nelson dedicated functions. View your generated help files as html, markdown, pdf, gitbook or directly in Nelson help viewer.

• Tests engine:

  Validate your algorithm using Nelson dedicated functions. Export the test results under the xUnit reports format.

• Profiling and Code coverage tools for Nelson’s language:

  Nelson has a built-in profiler that is very useful to profile your code and find out what script or function is taking the most time.

• Nelson cloud: Instant access to Nelson anywhere from an web browser.

• Module skeleton to extend Nelson available here:

  • template macros and builtin,
  • basic template macros only.

• Nelson Modules Manager (nmm) : package manager for Nelson

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