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numpy.js

This is part of Mozilla's collaborate project.

This is a very basic NumPy-like JavaScript library. It is required by our Python->JavaScript translator. Written in vanilla JavaScript, it aims at supporting a minimal set of routines for the most common use-cases in numerical computing. Eventually, the goal is to have a translator that takes relatively simple Python/NumPy functions and translates them to JavaScript. Typically, these functions will be interactivity functions (like callback functions reacting to mouse movements, key strokes...) and emitting GLIR (OpenGL) commands to update the visualization.

The first step here is to look at @mikolalysenko's ndarray library (MIT license) and see if we can reuse some of the code. Otherwise, we can as well start from scratch.

For high performance, we have to use TypedArrays, ArrayBuffers, and DataViews.

Features

  • ndarray structure (dtype, shape, strides, C-order/FORTRAN-order)
  • zeros, ones, eye, array, linspace, diagonal
  • views (without underlying copies)
  • data types to support: float32, float64, (u)int8|16|32
  • indexing with get(i, j, ...) and set(i, j, ..., v)
  • slice(start, stop, step) object, understood by indexing operators
  • transpose, reshape, repeat, flatten
  • copy
  • element-wise operations (+, -, *, /, %)
  • element-wise mathematical functions (cos, exp, log, etc.)

Optional features

From this minimal set of core features, additional features can be implemented later as needed.

  • min, argmin, mean, std, etc.
  • clip, cumsum, sum, etc.
  • dot