Numerical Ruby NArray

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NArray

NArray is an Numerical N-dimensional Array class. Supported element types are 1/2/4-byte Integer, single/double-precision Real/Complex, and Ruby Object. This extension library incorporates fast calculation and easy manipulation of large numerical arrays into the Ruby language. NArray has features similar to NumPy, but NArray has vector and matrix subclasses.

• Introduction
• NArray method list
• NMatrix & NVector - solving linear equation
• NArray demo:
  • Mandelbrot
  • Image shrinking
  • Image smoothing using FFTW
  • Life game
• Benchmark
• Source code: narray-0.5.9p7.tar.gz (2009-08-12)
• gem install

# install from source (requires compiler)
gem install narray

# Windows binary (MinGW version; works also with VC6 mswin32)
gem install narray --platform=x86-mingw32

• Known bugs
• halfway code of rewrite : version 20080822

Extension for NArray

FFTW3

A FFTW3 wrapper for NArray. FFTW is a fast DFT (Discrete Fourier Transform) library.

• Source code: ver 0.1.0 (2003-01-04)

na_geev

Eigenvalue & Eigenvector method for NMatrix using dgeev & zgeev routine in Lapack. Effort to wrap other Lapack routines is ongoing very slowly.

• Source code: ver 0.1.2 (2004-03-01)

Projects using NArray

• Dennou Ruby Project (RubyDCL, RubyNetCDF, ...)
• Ruby/GSL
• GridFlow
• ruby/audio
• Ruby/PGPLOT

Quanty (units)

A Quantity class containing "value" and "unit", providing automatic unit conversion and calculation. GNU/units data and Racc parser are employed.

• Description
• Source code: ver 1.2 (2004-02-29)

Other Tips

• Ruby Multi-dimensional Arrays

Link

• Ruby for Science @ Rwiki (Japanese)
• SciRuby Wiki

Author

Masahiro Tanaka