v1.6.0

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.

v1.5.0

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.

v1.4.0

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.

• pyenv: can use environment variables to set values.

• 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.

v1.3.0

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.

v1.2.0

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.

v1.1.0

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.

v1.0.0

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

v0.7.12

0.7.12 (2023-12-23)

Changed

• #674 Migrate sources to nelson-lang github organization.
• #775 quit, exit, startup.m, finish.m behavior reworked for compatibility.
• JSON for Modern C++ version 3.11.3 used on all platforms.
• {fmt} 10.1.1 (6f95000) used.
• Fedora 39 CI support.

Fixed

• cellfun did not check type of second input argument.

Added

• filter 1-D digital filter.

• control system module (part 2):

  • freqresp Evaluate system response over a grid of frequencies.
  • step Simulate continuous time model of a state space model or transfer function.
  • lsim Plot simulated time response of dynamic system to arbitrary inputs.
  • dc2 Convert model from discrete to continuous time.
  • c2d Convert model from continuous to discrete time.
  • augstate Append state vector to output vector.
  • kalman Design Kalman filter for state estimation.
  • evalfr Evaluate system response at specific frequency.
  • nyquist Nyquist plot of frequency response.
  • ord2 Generate continuous second-order systems.
  • append Group models by appending their inputs and outputs.
  • feedback Feedback connection of multiple models.
  • parallel Parallel connection of two models.
  • series Series connection of two models.
  • ssdelete Remove inputs, outputs and states from state-space system.
  • ssselect Extract subsystem from larger system.
  • tzero Invariant zeros of linear system.
  • tf2ss Convert transfer function filter parameters to state-space form.
  • ss2tf Convert state-space representation to transfer function.
  • minreal Minimal realization or pole-zero cancellation.
  • ssdata Access state-space model data.
  • tfdata Access transfer function data.
  • gram Controllability and observability Gramians.
  • hsvd Hankel singular values of a state-space or transfer function model.
  • damp Natural frequency and damping ratio.
  • balreal Gramian-based balancing of state-space realizations.
  • lqry Form linear-quadratic (LQ) state-feedback regulator with output weighting.
  • #957 dlqr Linear-quadratic (LQ) state-feedback regulator for discrete-time state-space system.
  • #961 lqed Discrete Kalman estimator design from continuous cost function.
  • #960 lqe Kalman estimator design for continuous-time systems.
  • #955 lqr Linear-Quadratic Regulator (LQR) design.
  • #943 dare Solve discrete-time algebraic Riccati equations.
  • #951 care Continuous-time algebraic Riccati equation solution.
  • #945 ctrbf Compute controllability staircase form.
  • #946 ctrb Controllability of state-space model.
  • #963 obsv Observability matrix.
  • #964 obsvf Compute observability staircase form.
  • #949 acker Pole placement gain selection using Ackermann's formula.
  • #950 bdschur Block-diagonal Schur factorization.
  • #952 cloop Close unity feedback loops.
  • #953 compreal Companion realization of transfer functions.
  • #959 gensig Create periodic signals for simulating system response.

v0.7.11

0.7.11 (2023-11-29)

Added

• hist Histogram plot.
• bar Bar graph.
• scatter Scatter plot.
• stem Plot discrete sequence data.
• stairs Stairstep graph.
• fill 2-D patch.
• pie legacy pie chart.
• subsref Subscripted reference.
• subsasgn Redefine subscripted assignment.
• substruct Create structure argument for subsasgn or subsref.
• deal Distribute inputs to outputs.
• Intel compiler support.

Changed

• axis limits recalculate with hggroup.
• axes forces focus on current axe.
• function_handle parenthese precedence.
• patch and fill manages FaceAlpha.
• visibility title and labels.
• object constructor must be in '@' directory and no more in parent directory (compatibility).
• subsref, subsasgn compatibility with substruct.
• To display a percent sign, you need to use a double percent sign (%%) in the format string (compatibility).
• French translation updated (100%, Thanks to weblate contributors)
• #997 Macos BigSur Github CI support removed.
• Qt 6.6.1 on win64 CI build.

Fixed

• A = []; A(false) = zeros(3, 0) did not return an empty matrix but an error.

v0.7.10

0.7.10 (2023-10-27)

Added

• private functions/folders support (to limit the scope of a function).

• syntax extended to facilitate the creation of literal integers without loss of precision:

  • example: 18446744073709551615u64, 18446744073709551615i64 (similar to rust syntax)

• flintmax('like', p) syntax added.

• int64, uint64 warning about double-precision.

• #570 balance: Diagonal scaling to improve eigenvalue accuracy.

• isobject Check whether the input is an object.

• cell2mat Convert cell array of matrices to single matrix.

• #948 blkdiag Create a block diagonal matrix from 2D matrices of different sizes.

• kron Kronecker tensor product.

• strjust Justify strings.

• control system module (part 1):

  • #967 control system module template.
  • #944 mag2db, db2mag, pow2db, db2pow functions.
  • #968 zp2tf: Zero-pole to transfer function conversion.
  • #954 dcgain: Low-frequency (DC) gain of LTI system.
  • #965 padecoef: Padé approximation of time delays.
  • #958 esort: Sort continuous-time poles by real part.
  • dsort: Sort discrete-time poles by magnitude.
  • #962 lyap: Continuous Lyapunov equation solution.
  • dlyap: Discret Lyapunov equation solution.
  • abcdchk Verifies the dimensional compatibility of matrices A, B, C, and D.
  • ss: State-space model.
  • tf: Transfer function model (display, horzcat, vertcat, size).
  • isct: checks if dynamic system model is in continuous time.
  • isdt: checks if dynamic system model is in discret time.
  • isstatic: checks if model is static or dynamic.
  • islti: checks if variable is an linear model tf, ss or zpk.
  • issiso: checks if dynamic system model is a single input and single output.
  • zero: Zeros and gain of SISO dynamic system.
  • pole: Poles of dynamic system.
  • bode: Bode plot of frequency response, magnitude and phase data.

Changed

• some modules (nig, modules_manager, help_browser) reworked to use private functions.
• Windows 64 bit CI and release use Qt 6.6.0

Fixed

• #940 title bar on dark theme on Windows.
• help viewer using dark theme.
• adjust position xlabel on figure.
• #976 wrong output when reading a file with fscanf with size argument.
• #975 Legend color (and width) is not matching that of curve in figure.
• #988 anonymous function serialization '.^' and '^' are inversed.