number_of_groups

Counts number of groups across specified grouping and stratification variables in a data frame.
At least one grouping or stratification variable must be provided.

internal

Bayesian multivariate age-period-cohort (MAPC) models for analyzing health data, with support for model fitting, visualization, stratification, and model comparison. Inference focuses on identifiable cross-strata differences, as described by Riebler and Held (2010) <doi:10.1093/biostatistics/kxp037>. Methods for handling complex survey data via the 'survey' package are included, as described in Mercer et al. (2014) <doi:10.1016/j.spasta.2013.12.001>.

Lars Vatten

MAPCtools

Multivariate Age-Period-Cohort (MAPC) Modeling for Health Data

number_of_groups function

<dl><dt>df</dt>
<dd>A data frame with grouping and/or stratification variables.</dd>
<dt>group_by</dt>
<dd>Variables in data frame that defines a grouping of the data.</dd></dl>

Arguments

Count number of groups across a set of variables in a data frame — number_of_groups

<dl>

<dt>df</dt>
<dd>A data frame with grouping and/or stratification variables.</dd>


<dt>group_by</dt>
<dd>Variables in data frame that defines a grouping of the data.</dd>

</dl>

number_of_groups: Count number of groups across a set of variables in a data frame

Description

Usage

Value

Arguments