## Add an x axis to the current plot

### Description

This function adds an x-axis to the current plot. Intended for use when the plot does not fall along the bottom row, but you plan to put no plot beneath it.

### Usage

  addxaxis()


### Author(s)

Carlisle Rainey (e-mail, website)

### Examples

par(mfrow = c(2,2), mar = c(.75,.75,.75,.75), oma = c(3,3,1,1))
eplot(xlim = c(-1, 1), ylim = c(-1, 1), xlab = "X Label")
aplot()