I am trying to use a github package from a worked example. I used the suggested methods
here to get the install-github working
library(devtools) library(httr) set_config(config(ssl_verifypeer = 0L)) install.packages("install_github") install_github("ggbiplot", "vqv") I get a warning that redirects me to the R website install page, and then error Error in parse_repo_spec(repo) : Invalid git repo specification: 'ggbiplot'
Ultimately, I want to run this piece of code
# Load data data(iris) log.ir <- log(iris[, 1:4]) ir.species <- iris[, 5] #PCA ir.pca <- prcomp(log.ir, center = TRUE, scale. = TRUE) #Plot g <- ggbiplot(ir.pca, obs.scale = 1, var.scale = 1, groups = ir.species, ellipse = TRUE, circle = TRUE) g <- g + scale_color_discrete(name = '') g <- g + theme(legend.direction = 'horizontal', legend.position = 'top') print(g) 1 Answer
You need the user/repo syntax to specify the repo, since there are multiple packages called ggbiplot on GitHub - the R package has 157 forks and you have to tell R which one you want:
library(devtools) install_github('vqv/ggbiplot') #> Downloading GitHub repo vqv/ggbiplot@HEAD library(ggbiplot) Now we can run your code:
data(iris) log.ir <- log(iris[, 1:4]) ir.species <- iris[, 5] #PCA ir.pca <- prcomp(log.ir, center = TRUE, scale. = TRUE) #Plot g <- ggbiplot(ir.pca, obs.scale = 1, var.scale = 1, groups = ir.species, ellipse = TRUE, circle = TRUE) g <- g + scale_color_discrete(name = '') g <- g + theme(legend.direction = 'horizontal', legend.position = 'top') print(g) 
