Background and grid color control.

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.

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

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))