R: table methods for barchart and dotplot

barchart.table {lattice} | R Documentation

## 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, ..., horizontal = TRUE)

    ## S3 method for class 'array':
    barchart(x, data, ...)

    ## S3 method for class 'matrix':
    barchart(x, data, ...)

    ## S3 method for class 'table':
    dotplot(x, data, groups = TRUE, ..., horizontal = TRUE)

    ## S3 method for class 'array':
    dotplot(x, data, ...)

    ## S3 method for class 'matrix':
    dotplot(x, data, ...)

### 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.

### 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.

### 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.

### Author(s)

Deepayan Sarkar Deepayan.Sarkar@R-project.org

### See Also

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

### Examples

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

[Package lattice version 0.17-17 Index]