Statistica

This is Statistica, a lightweight gem that is built to help in analyzing an array of number values. It arose from needing to do some descriptive statistics in one of my personal projects as well as taking on the challenge of building a framework that could be reusable in future requirements. I also feel obligated to share this as someone who has been a beneficiary of many open-source libraries/plugins/gems. Hopefully you could find a good use for this gem!

Add this line to your application's Gemfile:

gem 'statistica'

And then execute:

$ bundle

Or install it yourself as:

$ gem install statistica

This gem is for calculation of simple descriptive statistics of a given array of values as described above. After following the installation instructions above, then the gem is ready for use.

There are 14 methods available for an array of numbers. They are:

arithmetic mean - get_arith_mean.

geometric mean - get_geo_mean.

harmonic mean - get_harm_mean.

median - get_median.

range - get_range.

mode - get_mode.

product - get_product.

sum - get_sum.

variance - get_variance.

standard deviation - get_stdev.

percentile - get_percentile(n) (e.g. n = 25 for 25 percentile).

interquartile range - get_interquartile_range (difference between 75 percentile and 25 percentile).

relative variance - get_relative_variance.

coefficient of variation - get_coeff_variation.

Let obj = [2, 3, 4] be an array object. To calculate the arithmetic mean of the array object just do:

obj.get_arith_mean

Or alternatively,

[2, 3, 4].get_arith_mean.

Same pattern applies to every other method available in the gem (list given above). And that's it! It's not any more complex than that.

Please submit bug reports and make pull requests at https://github.com/tab300/statistica.

This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.