Forest plots using R and ggplot2

credplot.R

credplot.gg <- function(d){
  # d is a data frame with 4 columns
  # d$x gives variable names
  # d$y gives center point
  # d$ylo gives lower limits
  # d$yhi gives upper limits
  require(ggplot2)
  p <- ggplot(d, aes(x=x, y=y, ymin=ylo, ymax=yhi))+
    geom_pointrange()+
    geom_hline(yintercept = 0, linetype=2)+
    coord_flip()+
    xlab('Variable')
  return(p)
}

The code from today works with R 3.2.0 and ggplot2 2.0.0

Hello Abhijit,

Thank you for posting this function, I found it very helpful. However, I have an additional request, if you would be so kind.

I would like to include a second center point and confidence limits under the same variable name (possibly shaded with a different colour). I could format the data frame input to have column headings of d$y1, d$y2, d$y1lo, d$y2lo, d$y1hi, and d$y2hi, all under the same variable name (d$x).

Would this require alot of changes to your current function?

Abdool