R: Background and grid color control.

backGround {prodlim} | R Documentation

## Background and grid color control.

### Description

Some users like background colors, and it may be helpful to have grid lines to read off e.g. probabilities from a Kaplan-Meier graph. Both things can be controlled with this function. However, it mainly serves `plot.prodlim`.

### Usage

    backGround(xlim, ylim, bg = "white", fg = "gray77", horizontal = NULL,
      vertical = NULL, border = "black")

### Arguments

`xlim` | Limits for the xaxis, defaults to par("usr")[1:2].
`ylim` | Limits for the yaxis, defaults to par("usr")[3:4].
`bg` | Background color. Can be multiple colors which are then switched at each horizontal line.
`fg` | Grid line color.
`horizontal` | Numerical values at which horizontal grid lines are plotted.
`vertical` | Numerical values at which vertical grid lines are plotted.
`border` | The color of the border around the background.

### Author(s)

Thomas Alexander Gerds <tag@biostat.ku.dk>

### Examples

    plot(0,0)
    backGround(bg="beige",fg="red",vertical=0,horizontal=0)

    plot(0,0)
    backGround(bg=c("yellow","green"),fg="red",xlim=c(-1,1),ylim=c(-1,1),horizontal=seq(0,1,.1))
    backGround(bg=c("yellow","green"),fg="red",horizontal=seq(0,1,.1))

[Package prodlim version 2018.04.18 Index]