This package is used to define the desired table using function and model formula.

the doBy package in R is not a widely recognized or commonly used package. It’s possible that there have been updates or changes in the R ecosystem since then.

However, as of my last update, there isn’t a widely known package named “doBy” in the CRAN (Comprehensive R Archive Network) repository or in the R community. It’s possible that the package could be a relatively new or niche package that has been developed or updated after my last update.

If you are referring to a different package or if there have been developments in the R ecosystem since then, I recommend checking the official CRAN repository, package documentation, or other reliable sources for the most up-to-date and accurate information about the doBy package in R. You can use the following R code to check if the package is available:
# Check if the doBy package is installed
if (!requireNamespace(“doBy”, quietly = TRUE)) {
# Install the doBy package if not installed
install.packages(“doBy”)
}

# Load the doBy package
library(doBy)
After loading the package, you can explore its documentation and functions using help(doBy) or by referring to the package documentation.