compareFits {nlme} | R Documentation |

## Compare Fitted Objects

### Description

The columns in `object1`

and `object2`

are put together in
matrices which allow direct comparison of the individual elements for
each object. Missing columns in either object are replaced by
`NA`

s.

### Usage

compareFits(object1, object2, which)

### Arguments

`object1,object2` |
data frames, or matrices, with the same
row names, but possibly different column names. These will usually
correspond to coefficients from fitted objects with a grouping
structure (e.g. `lme` and `lmList` objects). |

`which` |
an optional integer or character vector indicating which
columns in `object1` and `object2` are to be used in the
returned object. Defaults to all columns. |

### Value

a three-dimensional array, with the third dimension given by the number
of unique column names in either `object1`

or `object2`

. To
each column name there corresponds a matrix with as many rows as the
rows in `object1`

and two columns, corresponding to `object1`

and `object2`

. The returned object inherits from class
`compareFits`

.

### Author(s)

Jose Pinheiro Jose.Pinheiro@pharma.novartis.com and Douglas Bates bates@stat.wisc.edu

### See Also

`plot.compareFits`

,
`pairs.compareFits`

,
`comparePred`

,
`coef`

,
`random.effects`

### Examples

fm1 <- lmList(Orthodont)
fm2 <- lme(fm1)
compareFits(coef(fm1), coef(fm2))

[Package

*nlme* version 3.1-66

Index]