pairs.compareFits            package:nlme            R Documentation

Pairs Plot of compareFits Object

Description:

     Scatter plots of the values being compared are generated for each
     pair of coefficients in 'x'. Different symbols (colors) are used
     for each object being compared and values corresponding to the
     same group are joined by a line, to facilitate comparison of fits.
     If only two coefficients are present, the 'trellis' function
     'xyplot' is used; otherwise the 'trellis' function 'splom' is
     used.

Usage:

     ## S3 method for class 'compareFits':
     pairs(x, subset, key, ...)

Arguments:

       x: an object of class 'compareFits'.

  subset: an optional logical or integer vector specifying which rows
          of 'x' should be used in the plots. If missing, all rows are
          used.

     key: an optional logical value, or list. If 'TRUE', a legend is
          included at the top of the plot indicating which symbols
          (colors) correspond to which objects being compared. If
          'FALSE', no legend is included. If given as a list, 'key' is
          passed down as an argument to the 'trellis' function
          generating the plots ('splom' or  'xyplot'). Defaults to
          'TRUE'.

     ...: optional arguments passed down to the 'trellis' function
          generating the plots.

Value:

     Pairwise scatter plots of the values being compared, with
     different symbols (colors) used for each object under comparison.

Author(s):

     Jose Pinheiro and Douglas Bates

See Also:

     'compareFits', 'plot.compareFits'

Examples:

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

