R: (Deprecated) Compound Symmetry (COSY) Correlation Structure

cor_cosy {brms} | R Documentation

## (Deprecated) Compound Symmetry (COSY) Correlation Structure

### Description

This function is deprecated. Please see `cosy` for the new syntax. This functions is a constructor for the `cor_cosy` class, representing a compound symmetry structure corresponding to uniform correlation.

### Usage

    cor_cosy(formula = ~1)

### Arguments

`formula` | A one sided formula of the form `~ t`, or `~ t | g`, specifying a time covariate `t` and, optionally, a grouping factor `g`. A covariate for this correlation structure must be integer valued. When a grouping factor is present in `formula`, the correlation structure is assumed to apply only to observations within the same grouping level; observations with different grouping levels are assumed to be uncorrelated. Defaults to `~ 1`, which corresponds to using the order of the observations in the data as a covariate, and no groups.

### Value

An object of class `cor_cosy`, representing a compound symmetry correlation structure.

### Examples

    cor_cosy(~ visit | patient)

[Package brms version 2.16.3 Index]