lmList4-class {lme4} | R Documentation

## Class "lmList4" of 'lm' Objects on Common Model

### Description

Class `"lmList4"` is an S4 class with basically a `list` of objects of class `lm` with a common model (but different data); see `lmList()` which returns these.

Package nlme's `lmList()` returns objects of S3 class `"lmList"` and provides methods for them, on which our methods partly build.

### Objects from the Class

Objects can be created by calls of the form `new("lmList4", ...)` or, more commonly, by a call to `lmList()`.

### Methods

A dozen `methods` are provided. Currently, S4 methods for `show`, coercion (`as(.,.)`) and others inherited via `"list"`, and S3 methods for `coef`, `confint`, `fitted`, `fixef`, `formula`, `logLik`, `pairs`, `plot`, `predict`, `print`, `qqnorm`, `ranef`, `residuals`, `sigma`, `summary`, and `update`.

sigma(object)

  returns the standard deviation σ-hat (of the errors in the linear models), assuming a common variance σ^2 by pooling (even when `pool = FALSE` was used in the fit).

### See Also

`lmList`

### Examples

    if(getRversion() >= "3.2.0") {
      (mm <- methods(class = "lmList4"))
      ## The S3 ("not S4") ones :
      mm[!attr(mm,"info")[,"isS4"]]
    }
    ## For more examples:  example(lmList)  i.e., ?lmList

[Package lme4 version 1.1-21 Index]