Panel Function for Barcharts

USAGE:

panel.barchart(x, y, ...) 

ARGUMENTS:

x
horizontal coordinates for extent of bars.
y
vertical coordinates for the placement of bars.
...
graphical parameters to polygon can be specified. By default, the polygon fill color is determined by the trellis parameter bar.fill.

SIDE EFFECTS:

The panel.barchart function draws horizontal bars on the display.

SEE ALSO:

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