Desktop Survival Guide
by Graham Williams
We use the R language and the Rattle application to illustrate
concepts and modelling in data mining. R is both a programming
language and an interpreter. When we illustrate interactive sessions
with R we will generally show the R prompt, which by default is
>''. This allows the output from R to more easily be
distinguished. However, we generally do not include the continuation
prompt (a ``
+'') which appears when a single command extends
over multiple lines, as this makes it more difficult to cut-and-paste
from the examples in the electronic version of the book.
In providing example output from commands, at times we will truncate the listing and indicate missing components with [...]. While most examples will illustrate the output exactly as it appears in R there will be times where the format will be modified slightly to fit with publication limitations. This might involve silently removing or adding blank lines.
In describing the functionality of Rattle we will use a sans serif font to identify a Rattle widget (which is a graphical user interface component that we interact with, such as a button or menu). All of the widgets are indexed under Rattle/Widget in the index. The kinds of widgets that are used in Rattle include the check box for turning options on and off, and the radio button for selecting an option from a list of alternatives,
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