• What is NumRu-NArray

  + NumRu-NArray is a fork of NArray with big memory support (old name NArray-Bigmem)

• Difference from NArray

  + Big memory (over 2GB) support + new class NArray::LINT (64bit integer) + OpenMP support + Internal memory struct of NArray object (recompile is necessary for exteded library)

• Installation

  + Install NumRu NArray

  % gem install numru-narray
  

  + Compile (if you do not want to via gem)

  % bundle install
  % bundle exec rake compile
  

  + For OpenMP support

  OpenMP is enable for gcc compiler by default.
  However it is disabled for other compiler.
  "--openmp=" option for extconf.rb is available to enable and disable OpenMP support.
  If you want enable it for other compiler, execute extconf.rb with --openmp option.
    ruby extconf.rb --openmp=openmp_option
  If you want disable it for gcc compiler, --openmp option without any argument can be used.
    ruby extconf.rb --openmp=
  

• Run

  + load library

  require 'numru/narray'
  

  + enable OpenMP

  OpenMP is disabled by default at runtime.
  Set number of threads to "OMP_NUM_THREADS" environmental variable if you want enable it.
  If you want set the number in Ruby script, just insert the following code:
    ENV["OMP_NUM_THREADS"] = num_threads