R package created in 2013 and freely available at https://CRAN.R-project.org/package=survexp.fr
To install the survexp.fr package from the CRAN, open a R session and run install.packages("survexp.fr")
To install the survexp.fr package from GitHub, open a R session and:
install.packages("devtools")
(if not installed yet)devtools::install_github("hvaret/survexp.fr")