Numbl

A numerical computing environment compatible with MATLAB syntax, featuring 400+ built-in functions. Runs in your browser or on the command line.

Documentation | Browser IDE | REPL | Plot Gallery

Quick Start

Try it in the browser at numbl.org -- no installation required.

Or use the CLI:

npx numbl                      # interactive REPL
npx numbl eval "disp(eye(3))"  # evaluate inline code
npx numbl run script.m         # run a .m file

Install globally for regular use:

npm install -g numbl

Native Addon

For faster linear algebra, FFT, and C++ operations, build the optional native addon:

# Prerequisites: C++ compiler, libopenblas-dev, libfftw3-dev (or equivalents for your OS)
numbl build-addon

Rebuild after upgrading numbl (npm install -g numbl@latest).

Documentation

Full documentation is available at numbl.org/docs, covering:

• Getting Started -- installation, CLI options, native addon
• Language Features -- operators, data types, control flow, classes
• Built-in Functions -- 400+ functions by category
• Plotting -- 2-D/3-D plots, examples, CLI plot server
• Library Usage -- using numbl as an npm package
• Differences from MATLAB -- behavioral differences and limitations

VS Code Extension

The Numbl extension for VS Code provides inline error diagnostics and a built-in figure viewer.

Embedding

Numbl scripts can be embedded in HTML and Markdown pages. See the numbl-embed-example for usage and a live demo.

Authors

Jeremy Magland and Dan Fortunato, Center for Computational Mathematics, Flatiron Institute.

License

Apache 2.0

Disclaimer

numbl is not affiliated with, endorsed by, or supported by MathWorks, Inc. MATLAB is a registered trademark of MathWorks, Inc.