This section contains example functions and data objects
introduced in the S book.  There is no detailed documentation
for these functions, since they are all covered
in some detail in the S book.  The following functions
are present in this section (supporting functions are not listed):

FUNCTION	USE

all.names	All Names Present in an Expression
all.words	All Words Constructed from a Phone Number
annoy		Rings bell on terminal
backdrop	Bar Plot with Backdrop Shading
balance.of.trade	Playfair Balance of Trade Plot
bartable	Bar Plot from Category
bivariate.barplot	Bivariate Bar Plot	
check.write	Turns Numbers into English Words
col.labels	Set/Retrieve Matrix Column Labels
collection	Manage Related Collections of Data
contour.xyz	Contour Irregularly Spaced x,y,z Data
day.of.week	Day of Week from Julian Date
density.plot	One-Dimensional Density Plot
deriv		Symbolic Derivatives
deriv2		Caching Version of Symbolic Derivatives
diag<-		Replace Diagonal of Matrix
digits		Vector of Digits from a Number
function.diff	Show Differences Between Two Functions
gcd		Greatest Common Denominator
get.or.null	Gets Dataset or else Returns NULL
golf		Solitaire Card Game
ichar		Integer Equivalent for Ascii Characters
income.statement	Graphical Income Statement
is.dir		Test if argument is a directory
jdate		Julian Date for Today
jitter		Jitter Data for Plotting
julian		Julian Date from Month Day Year
larger		Picks the Larger Element from Two Args
lock.axis	Lock-In a Axis for Graphics
lscollection	List of Current Collections
make		Compile and Dynamically Load
mixplot		Barycentric Plot of 3-Component Mixture
month.day.year	Convert Julian Date to Month Day Year
multi.match	Match Multiple Patterns to Character Data
myplot		Do-it-yourself Plot Function
numbar		Barplot With Numbers Positioned at Bar Ends
persp.xyz	Prepare Matrix for Persp from Irregular x,y,z Data
phone.number	Turn Character String into Dialing Digits for Phone
quantile.plot	Empirical Quantile Plot
quantum		Find Common Denominator for Fractions
quick.print	Print With Limited Number of Decimals
quiz		Menu-oriented Quiz Program
randu		Bad Random Number Generator
row.labels	Set/Retrieve Matrix Row Labels
shaded.ts	Shade in Area Under Plot of Time Series
sign		Sign of Numbers (-1, 0, +1)
signum		Sign for Complex Numbers
sleep		Wait For Specified Time Interval
string.match	Match Pattern in Character Vector
substring	Substrings of Character data
tbl		Create File for the Tbl Preprocessor to Troff
theoretical.plot	Plot Data Against Quantiles of Theoretical Distn
unlock.axis	Unlock Plotting Axis
zero		Find Zeros of a Function

The Following datasets are present:

NAME		CONTENTS

exports		Playfair's British Exports Data
honda		Automobile Mileage Data
imports		Playfair's British Imports Data
month.length	Lengths of the 12 Months
months		Month Names
