There are two files:
 - data_sex_height_etc.txt (contains the data),
 - 1_stemplot.R.

Both are ASCII files, that is, you can open them with a simple
text editor. (Linux: "Kate" is an example of a suitable text editor;
very advanced users will prefer "Emacs". W: "MS-Wordpad" is a makeshift editor,
you might try to find something more powerful.)

To run in R (www.R-project.org):

1. Open R.

2. Change directory to the folder where files data_sex_height_etc.txt and 1_stemplot.R are located.
   (Or start R right from this forder.)
   The R command getwd() shows you where you are. The command setwd(...)
   lets you change the directory. The command dir() lists the contents of the
   current folder.

3. Enter the command source("1_stemplot.R") into the R command box.
   (Of course, you could also enter the code line by line.)

Good luck.

(HS, 2008-10-09)
