Column-wise MLE of the ordinal model without covariates {MLE}

Column-wise MLE of the ordinal model without covariates

Description

Column-wise MLE of the ordinal model without covariates.

Usage

colordinal.mle(y, link = "logit")

Arguments

y

A numerical matrix with values 1, 2, 3,..., not zeros, or a data.frame with ordered factors.

link

This can either be "logit" or "probit". It is the link function to be used.

Details

Maximum likelihood of the ordinal model (proportional odds) is implemented. See for example the "polr" command in R or the examples.

Value

A list including:

param

A matrix with the intercepts (threshold coefficients) of the model applied to each column (or variable).

loglik

The log-likelihood values.

Author(s)

Michail Tsagris and Sofia Piperaki.

R implementation and documentation: Michail Tsagris [e-mail] and Sofia Piperaki [e-mail].

References

Agresti, A. (2002) Categorical Data. Second edition. Wiley.

See Also

ordinal.mle

Examples

y <- matrix( rbinom(100 * 10, 2, 0.5) + 1, ncol = 10 )
res <- colordinal.mle(y, link = "probit")