Loaloa

Rousset et al. (2016) presented the loaloa data set which describes prevalence
of infection by the nematode Loa loa in North Cameroon, 1991-
2001. The study investigated the relationship between altitude, vegetation
indices, and prevalence of the parasite.

Allows various models for multivariate response variables where each response is assumed to follow double hierarchical generalized linear models. In double hierarchical generalized linear models, the mean, dispersion parameters for variance of random effects, and residual variance can be further modeled as random-effect models.

Maengseok Noh

mdhglm

Multivariate Double Hierarchical Generalized Linear Models

Loaloa function

A data frame with 197 observations on the following 11 variables.<dl class="dl-horizontal">
 <dt><code>longitude</code></dt><dd>longitude, in degrees</dd>
 <dt><code>latitude</code></dt><dd>latitude, in degrees</dd>
 <dt><code>ntot</code></dt><dd>sample size per location</dd>
 <dt><code>npos</code></dt><dd>number of infected individuals per location</dd>
 <dt><code>maxNDVI</code></dt><dd>maximum normalised-difference vegetation index (NDVI) from repeated
satellite scans</dd>
 <dt><code>seNDVI</code></dt><dd>standard error of NDVI</dd>
 <dt><code>elev1</code></dt><dd>altitude, in m</dd>
 <dt><code>elev2</code></dt><dd>additional altitude variables derived
from the previous one, provided for convenience respectively, positive values of altitude-650,</dd>
 <dt><code>elev3</code></dt><dd>positive values of altitude-1000</dd>
 <dt><code>elev4</code></dt><dd>positive values of altitude-1300</dd>
 <dt><code>maxNDVI1</code></dt><dd>a copy of maxNDVI modified as maxNDVI1 (maxNDVI1=0.8
if maxNDVI&gt;0.8, maxNDVI1=maxNDVI otherwise)</dd>
 </dl>

Format

Loaloa Data — Loaloa

A data frame with 197 observations on the following 11 variables.<dl class='dl-horizontal'>
 <dt><code>longitude</code></dt><dd>longitude, in degrees</dd>
 <dt><code>latitude</code></dt><dd>latitude, in degrees</dd>
 <dt><code>ntot</code></dt><dd>sample size per location</dd>
 <dt><code>npos</code></dt><dd>number of infected individuals per location</dd>
 <dt><code>maxNDVI</code></dt><dd>maximum normalised-difference vegetation index (NDVI) from repeated
satellite scans</dd>
 <dt><code>seNDVI</code></dt><dd>standard error of NDVI</dd>
 <dt><code>elev1</code></dt><dd>altitude, in m</dd>
 <dt><code>elev2</code></dt><dd>additional altitude variables derived
from the previous one, provided for convenience respectively, positive values of altitude-650,</dd>
 <dt><code>elev3</code></dt><dd>positive values of altitude-1000</dd>
 <dt><code>elev4</code></dt><dd>positive values of altitude-1300</dd>
 <dt><code>maxNDVI1</code></dt><dd>a copy of maxNDVI modified as maxNDVI1 (maxNDVI1=0.8
if maxNDVI&gt;0.8, maxNDVI1=maxNDVI otherwise)</dd>
 </dl>

Loaloa: Loaloa Data

Description

Usage

Arguments

Format

References