panel.barchart: Default Panel Functions for barchart
Description
This is the default panel function for barchart.Usage
panel.barchart(x, y, horizontal, col, ...)
Arguments
x
Endpoints of Bars. Bars start at left of panel.
y
Horizontal location of bars.
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
    expla
col
Color of the bars. By default, the trellis parameter
    bar.fill is used.
...
extra arguments will be accepted but ignored
synopsis
panel.barchart(x, y, box.ratio = 1, horizontal, col = bar.fill$col, ...)