Test package. Place myfunc.R in the R folder and roxygenise then build.

DESCRIPTION

Package: pkg
Version: 0.5-1
Date: 2004-01-01
Title: My First Collection of Functions
Authors@R: c(person("Joe", "Developer", role = c("aut", "cre"),
                    email = "[email protected]"),
             person("Pat", "Developer", role = "aut"),
             person("A.", "User", role = "ctb",
               email = "[email protected]"))
Author: Joe Developer and Pat Developer, with contributions from A. User
Maintainer: Joe Developer <[email protected]>
Imports: pls
Description: A short (one paragraph) description of what
 the package does and why it may be useful.
License: GPL (>= 2)
URL: http://www.r-project.org, http://www.another.url
BugReports: http://pkgname.bugtracker.url

myfunc.R

#' Test function
#' 
#' @importFrom pls predict
#' 
#' @export

myfunc <- function(x){
  stopifnot(class(x) == "mvr")
  predict(x)*2
}

pkg.RProj

Version: 1.0

RestoreWorkspace: Default
SaveWorkspace: Default
AlwaysSaveHistory: Default

EnableCodeIndexing: Yes
UseSpacesForTab: Yes
NumSpacesForTab: 2
Encoding: UTF-8

RnwWeave: knitr
LaTeX: pdfLaTeX

BuildType: Package
PackageInstallArgs: --no-multiarch
PackageRoxygenize: rd,collate,namespace