https://ghe.metrumrg.com/software/pmplots
repos <- c("https://metrumresearchgroup.github.io/r_validated", options()$repos) install.packages("pmplots", repos = unique(repos), type = "source", destdir = NULL)
News can be found here
Consider installing the cowplot package to help arranging plots on a page. Also, consider installing latex2exp to allow you to use latex in axis titles.