Group 1: Exercise 1

Why is it good practice to put a module in its own file in the R/ directory? What do you need to do to make sure it’s loaded by your Shiny app?

• I makes easier to transform the shiny app in to a package, as all the functions in a R package are store in the R/ folder.

• We will need to source() each of the modules.

sourceDir <- function(path, trace = TRUE, ...) {
    op <- options(); on.exit(options(op)) # to reset after each
    for (nm in list.files(path, pattern = "[.][RrSsQq]$")) {
       if(trace) cat(nm,":")
       source(file.path(path, nm), ...)
       if(trace) cat("\n")
       options(op)
    }
}