R: Create a Viewport with Scales based on Data

dataViewport {grid} | R Documentation

## Create a Viewport with Scales based on Data

### Description

This is a convenience function for producing a viewport with x- and/or y-scales based on numeric values passed to the function.

### Usage

    dataViewport(xData = NULL, yData = NULL, xscale = NULL,
                 yscale = NULL, extension = 0.05, ...)

### Arguments

`xData` | A numeric vector of data.
`yData` | A numeric vector of data.
`xscale` | A numeric vector (length 2).
`yscale` | A numeric vector (length 2).
`extension` | A numeric. If length greater than 1, then first value is used to extend the xscale and second value is used to extend the yscale.
`...` | All other arguments will be passed to a call to the `viewport()` function.

### Details

If `xscale` is not specified then the values in `x` are used to generate an x-scale based on the range of `x`, extended by the proportion specified in `extension`. Similarly for the y-scale.

### Value

A grid viewport object.

### Author(s)

Paul Murrell

### See Also

`viewport` and `plotViewport`.

[Package grid version 2.15.1 Index]