mdarray-jcsv

https://github.com/rbotafogo/jCSV

MDArray-jCSV (jCSV for short) is the first and only (as far as I know) multidimensional CSV reader. Multidimensional? Yes... jCSV can read multidimensional data, also known sometimes as 'panel data'. jCSV is based on Super CSV (http://super-csv.github.io/super-csv/index.html), a java CSV library. According to Super CSV web page its motivation is 'for Super CSV is to be the foremost, fastest, and most programmer-friendly, free CSV package for Java'. jCSV motivation is to bring this view to the Ruby world, and since we are in Ruby, make it even easier and more programmer-friendly.