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 \Ixscale and second value is used to extend the \Iyscale.
`...`	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