# barchart

From lattice v0.3-1
by Deepayan Sarkar

##### Bar Graphs

Draw Bar plots

- Keywords
- hplot

##### Usage

```
barchart(formula,
data = parent.frame(),
panel = panel.barchart,
box.ratio =2,
...)
```

##### Arguments

- formula
- a formula describing the form of conditioning plot. A
formula of the form
`y ~ x | g1 * g2 * ...`

indicates that plots of`y`

versus`x`

should be produced conditional on the variable`g1,g2,...`

. - panel
- panel function to be used to draw panels
- data
- data frame for the variables in the formula etc
- box.ratio
- ratio of bar width to inter bar width
- ...
- other arguments

##### Details

see the documentation for `trellis.args`

.

##### Value

- An object of class ``trellis'', plotted by default by
`print.trellis`

.

##### Note

The x-axis limits might not be meaningful. The bars are drawn from the extreme left of the panel, whatever be the x-limits.

##### synopsis

barchart(formula, data = parent.frame(), panel = "panel.barchart", prepanel = NULL, strip = TRUE, box.ratio = 2, groups = NULL, ..., subset = TRUE)

##### See Also

##### Examples

```
data(barley)
barchart(variety ~ yield | year * site, data = barley, aspect = 0.4,
xlab = "Barley Yield (bushels/acre)")
```

*Documentation reproduced from package lattice, version 0.3-1, License: GPL version 2 or later*

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