StreamStat: Aggregate large data statictics with streaming.

StreamStat

A library to aggragate statistics of large data with streaming, less memory.

Usage

Aggragate a SD of large_data.

p StreamStat.new(large_data).inject { |_a, stat| stat }.sd

View the intermediate results.

p StreamStat.new(large_data)
            .lazy
            .each_with_index
            .inject { |_a, r| stat, i = r; p stat.sd if i % 100 == 0; stst }
            .sd

Installation

Add this line to your application's Gemfile:

gem 'stream_stat'

And then execute:

$ bundle

Or install it yourself as:

$ gem install stream_stat