lattice (version 0.17-25)

barchart.table: table methods for barchart and dotplot

Description

Contingency tables are often displayed using barcharts and dotplots. These methods are provided for convenience and operate directly on tables. Arrays and matrices are simply coerced to be a table.

Usage

## S3 method for class 'table':
barchart(x, data, groups = TRUE,
         origin = 0, stack = TRUE, \dots, horizontal = TRUE)
## S3 method for class 'array':
barchart(x, data, \dots)
## S3 method for class 'matrix':
barchart(x, data, \dots)
## S3 method for class 'table':
dotplot(x, data, groups = TRUE, \dots, horizontal = TRUE)
## S3 method for class 'array':
dotplot(x, data, \dots)
## S3 method for class 'matrix':
dotplot(x, data, \dots)

Arguments

x

a table, array or matrix object.

data

should not be specified. If specified, will be ignored with a warning.

groups

logical, whether to use the last dimension as the grouping variable in the display.

origin, stack

arguments to panel.barchart controlling the display. The defaults for the table method are different.

horizontal

logical, indicating whether the plot should be horizontal (with the categorical variable on the y-axis) or vertical.

...

other arguments, passed to the underlying formula method.

Value

• An object of class "trellis". The update method can be used to update components of the object and the print method (usually called by default) will plot it on an appropriate plotting device.

Details

The first dimension is used as the variable on the vertical axis. The last dimension is optionally used as a grouping variable (to produce stacked barcharts by default). All other dimensions are used as conditioning variables. The order of these variables cannot be altered (except by permuting the original argument using t or aperm). For more flexibility, use the formula method after converting the table to a data frame using the relevant as.data.frame method.

See Also

barchart, t, aperm, table, panel.barchart, Lattice

Examples

barchart(Titanic, scales = list(x = "free"),
         auto.key = list(title = "Survived"))