# dataViewport

##### Create a Viewport with Scales based on Data

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

- Keywords
- dplot

##### 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.

##### See Also

`viewport`

and
`plotViewport`

.

*Documentation reproduced from package grid, version 3.5.3, License: Part of R 3.5.3*

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