# statsample-bivariate-extension

[![Build Status](https://travis-ci.org/SciRuby/statsample-bivariate-extension.svg)](https://travis-ci.org/SciRuby/statsample-bivariate-extension)

* http://ruby-statsample.rubyforge.org/

## DESCRIPTION:

Provides advanced bivariate statistics:
* Tetrachoric correlation
* Polychoric correlation

## FEATURES/PROBLEMS:

* Statsample::Bivariate::Polychoric class provides polychoric correlation
* Statsample::Bivariate::Tetrachoric class provides tetrachoric correlation


## SYNOPSIS:

### Tetrachoric correlation

    require 'statsample'
    a=40
    b=10
    c=20
    d=30
    tetra=Statsample::Bivariate::Tetrachoric.new(a,b,c,d)
    puts tetra.summary
    
### Polychoric correlation

    require 'statsample'
    ct=Matrix[[58,52,1],[26,58,3],[8,12,9]]
    
    poly=Statsample::Bivariate::Polychoric.new(ct)
    puts poly.summary


## REQUIREMENTS:

* Statsample

## INSTALL:

This gem is a statsample dependency. If you want to install it separatly

* gem install statsample-bivariate-extension

## LICENSE:

BSD 2-Clause (see LICENSE.txt)


statsample-bivariate-extension

Claudio Bustos

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statsample-bivariate-extension

statsample-bivariate-extension

DESCRIPTION:

FEATURES/PROBLEMS:

SYNOPSIS:

Tetrachoric correlation

Polychoric correlation

REQUIREMENTS:

INSTALL:

LICENSE:

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