Use roxygen2 to generate namespace: a small example or template

Question

Using roxygen2 to generate namespace is completely new to me. Some related questions have been asked and answered multiple times as well as http://r-pkgs.had.co.nz/namespace.html. I still find it difficult for me. I definitely need to read more on this topic. Meanwhile, I just wonder if someone could offer a simple example of code to quickly get me into it first.

I'm not sure the following information will help. I have several functions in the package. The DESCRIPTION includes something like:

Imports: 
   dplyr, 
   ggplot2,
   survival

Thanks,

Answer 1

Try to create a function within the R folder of you package.

Something like

#' Function to plot something
#' 
#' @param my_data a data frame
#' @param x column name for x axis
#' @param y column name for y axis
#' @export
#' @import ggplot2
#' @examples
#' plotSomething(iris, 'Sepal.Length', 'Sepal.Width') 
plotSomething <- function(my_data, x, y) {
  ggplot(my_data, aes_string(x=x, y=y)) + geom_point()
}

The keywords @export and @import will be parsed by roxygen2 and will update the NAMESPACE file after using devtools::document().