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README.md

statsample-bivariate-extension

Build Status

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)

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Polychoric and Tetrachoric support for statsample

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