The goal of ismisc is to provide me with the functions that I use frequently.
# install.packages("devtools")
# devtools::install_github("ismailmuller/ismisc")
This is a basic example which shows you how to solve a common problem:
# require(ismisc)
#
# split_file_into(iris, out_file = "iris_splitted.xlsx", split_by = "Species", into = "sheets")
# file.exists("iris_splitted.xlsx")