ulcer

datasets

Bivariate additive categorical regression via penalized maximum likelihood.
Under a multinomial framework, the method fits bivariate models where both
responses are nominal, ordinal, or a mix of the two. Partial proportional
odds models are supported, with flexible (non-)uniform association structures.
Various logit types and parametrizations can be specified for both marginals
and the association, including Dale’s model. The association structure can
be regularized using polynomial-type penalty terms. Additive effects are
modeled using P-splines. Standard methods such as summary(), residuals(),
and predict() are available.

Marco ENEA

pblm

Bivariate Additive Marginal Regression for Categorical Responses

Marco Enea

Mikis Stasinopoulos

Robert Rigby

ulcer function

A data frame with 48 observations and 4 variables.<dl>
 <dt><code>medication</code></dt>
<dd>medication requirements. A factor with levels <code>never</code>; <code>seldom</code>; <code>occasionally</code>; and <code>regularly</code>.</dd> <dt><code>pain</code></dt>
<dd>patients' post operative pain level. A factor with levels <code>none</code>, <code>slight</code> and <code>moderate</code></dd>
. 
 <dt><code>operation</code></dt>
<dd>a factor representing the type of operation with levels: vagatomy drainage procedure (<code>vp</code>); vagatomy and distal antrectomy (<code>va</code>); vagatomy and hemigastrectomy (<code>vh</code>); and resection alone (<code>ra</code>)</dd>
.
 <dt><code>freq</code></dt>
<dd>a numeric vector representing the number of patients classified for the corresponding levels of <code>pain</code>, <code>medication</code> and <code>operation</code></dd> 
</dl>

Format

The ulcer data — ulcer

A data frame with 48 observations and 4 variables.<dl>
 <dt><code>medication</code></dt>
<dd>medication requirements. A factor with levels <code>never</code>; <code>seldom</code>; <code>occasionally</code>; and <code>regularly</code>.</dd>

 <dt><code>pain</code></dt>
<dd>patients' post operative pain level. A factor with levels <code>none</code>, <code>slight</code> and <code>moderate</code></dd>
. 
 <dt><code>operation</code></dt>
<dd>a factor representing the type of operation with levels: vagatomy drainage procedure (<code>vp</code>); vagatomy and distal antrectomy (<code>va</code>); vagatomy and hemigastrectomy (<code>vh</code>); and resection alone (<code>ra</code>)</dd>
.
 <dt><code>freq</code></dt>
<dd>a numeric vector representing the number of patients classified for the corresponding levels of <code>pain</code>, <code>medication</code> and <code>operation</code></dd>

 
</dl>

The ulcer data

ulcer: The ulcer data

Description

Usage

Arguments

Format

Examples