Step 8: The sample package
To show you how this is done we have to create a sample package. Before you jump to do that create a new directory from your working directory. For this excercise I’ve created a new directory called “TestPackage”. Start your R session and change your working directory to be the new directory you have created.
getwd()  "C:/Users/steve/Documents/TestPackage"
So, now that I’m in my TestPackage directory, I’m going to create a test package. To do this we are going to use a tool called package.skeleton. At your prompt, enter ?package.skeleton(). read this help carefully as it explains what you will have to do in the future when you make your own packages. Since I’m using RStudio I merely cut and past the example code into my console
require(stats) ## two functions and two "data sets" : f <- function(x,y) x+y g <- function(x,y) x-y d <- data.frame(a=1, b=2) e <- rnorm(1000) package.skeleton(list=c("f","g","d","e"), name="mypkg")
And then I execute that code
And you should get the following message in your console
Creating directories ... Creating DESCRIPTION ... Creating Read-and-delete-me ... Saving functions and data ... Making help files ... Done. Further steps are described in './mypkg/Read-and-delete-me'.
And you can check that the files were created. Here is what my system looks like now.
So following the instructions lets look at the Read-and-delete-me file. I just used RStudio to do that. And I get a look at the file
* Edit the help file skeletons in 'man', possibly combining help files for multiple functions. * Put any C/C++/Fortran code in 'src'. * If you have compiled code, add a .First.lib() function in 'R' to load the shared object. * Run R CMD build to build the package tarball. * Run R CMD check to check the package tarball. Read "Writing R Extensions" for more information.
The instructions are pretty clear. I have to edit the manual files in order to build properly. On to step 9