COLP {COLP}

Causal Discovery for Bivariate Cateogrical Data

Description

Estimate a causal directed acyclic graph (DAG) for ordinal cateogrical data with greedy or exhaustive search.

Usage

COLP(y, x, algo = "E")

Arguments

y

factor, a potential effect variable

x

factor, a potential cause variable

algo

exhaustive search (algo="E") of category ordering or greedy search (algo="G")

Value

A list of length 3. cd = 1 if x causes y; cd = 0 otherwise. P is the optimal odering of the effect variable. epsilon is the difference in log-likelihood favoring x causes y.

Examples

fit = COLP(CatPairs[[1]][[1]]$Diffwt,CatPairs[[1]][[1]]$Treat,algo="E")
fit$cd