Forest plots using R and ggplot2

March 9, 2011

(This article was first published on Getting Genetics Done, and kindly contributed to R-bloggers)

Abhijit over at Stat Bandit posted some nice code for making forest plots using ggplot2 in R. You see these lots of times in meta-analyses, or as seen in the BioVU demonstration paper. The idea is simple - on the x-axis you have the odds ratio (or whatever stat you want to show), and each line is a different study, gene, SNP, phenotype, etc. You draw a dot for the odds ratio point estimate, and lines extending from that point showing the confidence limits for that odds ratio.

Here's the R code, slightly modified from Abhijit's version:

And here's what you get:

Thanks for sharing the code, Abhiji!

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