scale_symmetric: Symmetrix position scale for continuous x and y

In lemon: Freshing Up your 'ggplot2' Plots

Symmetrix position scale for continuous x and y

Description

scale_x_symmetric and scale_y_symmetric are like the default scales for continuous x and y, but ensures that the resulting scale is centered around mid. Does not work when setting limits on the scale.

Usage

scale_x_symmetric(mid = 0, ...)

scale_y_symmetric(mid = 0, ...)

Arguments

mid	Value to center the scale around.
...	Values passed on to scale_continuous.

Examples

library(ggplot2)
df <- expand.grid(a=c(-1,0,1), b=c(-1,0,1))
rnorm2 <- function(x,y,n,sdx,sdy) {
  if (missing(sdy))
    sdy <- sdx
  data.frame(a=x,b=y,x=rnorm(n,x,sdx), y=rnorm(n,y,sdy))
}
df <- mapply(rnorm2,df$a, df$b, MoreArgs=list(n=30,sdx=1),SIMPLIFY=FALSE)
df <- do.call(rbind, df)
(p <- ggplot(df, aes(x=x,y=y)) + geom_point() +
  facet_grid(a~b, scales='free_x')
)
p + scale_x_symmetric(mid=0)

lemon documentation built on May 29, 2024, 8:48 a.m.