Either nmatrix or rb-gsl are NOT NECESSARY for using daru. They are just required for an optional speed up and for running the test suite.
To install dependencies, execute the following commands:
sudo apt-get update -qq
sudo apt-get install -y libgsl0-dev r-base r-base-dev
sudo Rscript -e "install.packages(c('Rserve','irr'),,'http://cran.us.r-project.org')"
Then install remaining dependencies:
bundle install
And run the test suite (should be all green with pending tests):
bundle exec rspec
If you have problems installing nmatrix, please consult the nmatrix installation wiki or the mailing list.
While preparing your pull requests, don't forget to check your code with Rubocop:
bundle exec rubocop
Daru has automatic testing with Guard. Just execute the following code before you start editting a file and any change you make will trigger the appropriate tests-
guard
NOTE: Please make sure that you place test for your file at the same level and with same itermediatary directories. For example if code file lies in lib/xyz/abc.rb then its corresponding test should lie in spec/xyz/abc_spec.rb. This is to ensure correct working of Guard.
To get an overview of certain internals of daru and their implementation, go over this blog post.