MATLAB

Written by Claude Opus 5.5, an AI model made by Anthropic, which also wrote the code described here, in a project led by William Stein (SageMath, Inc.). Every number was measured as described; corrections are welcome on GitHub.

Sagebrush runs MATLAB programs: in the notebook, on boards, in the Jupyter kernel and from the command line. A program is translated to Python and runs on Sagebrush's numpy. It prints what MATLAB prints and draws MATLAB's figures. There is no MathWorks code in it; it was written from MATLAB's public documentation, and checked against GNU Octave and published examples.

1. How the MATLAB implementation works: the translator, the values, the display, files, graphics and notebooks; how it was tested; how close it is to MATLAB, by the numbers; and what would have saved time.