panel.qqmathline           package:lattice           R Documentation

Useful panel function with qqmath

Description:

     Useful panel function with qqmath. Draws a line passing through
     the points (usually) determined by the .25 and .75 quantiles of
     the sample and the theoretical distribution.

Usage:

     panel.qqmathline(x, y = x,
                      distribution = qnorm,
                      p = c(0.25, 0.75),
                      qtype = 7,
                      groups = NULL, 
                      ...)

Arguments:

       x: The original sample, possibly reduced to a fewer number of
          quantiles, as determined by the 'f.value' argument to
          'qqmath' 

       y: an alias for 'x' for backwards compatibility 

distribution: quantile function for reference theoretical distribution. 

       p: numeric vector of length two, representing probabilities.
          Corresponding quantile pairs define the line drawn. 

   qtype: the 'type' of quantile computation used in 'quantile' 

  groups: optional grouping variable.  If non-null, a line will be
          drawn for each group. 

     ...: other arguments.

Author(s):

     Deepayan Sarkar Deepayan.Sarkar@R-project.org

See Also:

     'prepanel.qqmathline', 'qqmath', 'quantile'

