panel.barchart            package:lattice            R Documentation

Default Panel Function for barchart

Description:

     Default panel function for 'barchart'.

Usage:

     panel.barchart(x, y, box.ratio = 1,
                    horizontal = TRUE,
                    origin = NULL, reference = TRUE,
                    stack = FALSE,
                    groups = NULL, 
                    col = if (is.null(groups)) bar.fill$col else
                    regions$col,
                    ...)

Arguments:

       x: Extent of Bars. By default, bars start at left of panel,
          unless 'origin' is specified, in which case they start there 

       y: Horizontal location of bars, possibly factor

box.ratio: ratio of bar width to inter-bar space

horizontal: logical. If FALSE, the plot is `transposed' in the sense
          that the behaviours of x and y are switched. x is now the
          `factor'.  Interpretation of other arguments change
          accordingly. See documentation of 'bwplot' for a fuller
          explanation. 

  origin: origin of the bars. For grouped displays with 'stack = TRUE',
          this argument is ignored and the origin set to 0. Otherwise,
          defaults to 'NULL', in which case bars start at leftmost end
          of panel. 

reference: logical, whether a reference line is to be drawn at the
          origin 

   stack: logical, relevant when groups is non-null. If 'FALSE' (the
          default), bars for different values of the grouping variable
          are drawn side by side, otherwise they are stacked. 

  groups: optional grouping variable

     col: Color of the bars. By default, the trellis parameter
          'bar.fill' is used if there is no grouping variable,
          otherwise 'regions' is used.  

     ...: extra arguments will be accepted but ignored 

Details:

     A barchart is drawn in the panel. Note that most arguments
     controlling the display can be supplied to the high-level
     'barchart' call directly.

Author(s):

     Deepayan Sarkar deepayan@stat.wisc.edu

See Also:

     'barchart'

