abs.error.pred  Computes various indexes of predictive accuracy based
                    on absolute errors, for linear models
all.is.numeric  Check if character strings are legal numerics
approxExtrap    Linear extrapolation
aregImpute      Multiple imputation based on additive regression,
                    bootstrapping, and predictive mean matching
areg.boot       Nonparametrically estimate transformations for both
                    sides of a multiple additive regression, and
                    bootstrap these estimates and R^2
ballocation     Optimum sample allocations in 2-sample proportion test
binconf         Exact confidence limits for a proportion and more accurate
                    (narrower!) score stat.-based Wilson interval
                    (Rollin Brant, mod. FEH)
bootkm          Bootstrap Kaplan-Meier survival or quantile estimates
bpower          Approximate power of 2-sided test for 2 proportions
                    Includes bpower.sim for exact power by simulation
bpplot          Box-Percentile plot 
                    (Jeffrey Banfield, umsfjban@bill.oscs.montana.edu)
bsamsize        Sample size requirements for test of 2 proportions
bystats         Statistics on a single variable by levels of >=1 factors
bystats2        2-way statistics
calltree        Calling tree of functions 
                    (David Lubinsky, david@hoqax.att.com)
character.table Shows numeric equivalents of all latin characters
                    Useful for putting many special chars. in graph titles
                    (Pierre Joyet, pierre.joyet@bluewin.ch)
ciapower        Power of Cox interaction test
cleanup.import  More compactly store variables in a data frame, and clean up
                    problem data when e.g. Excel spreadsheet had a non-
                    numeric value in a numeric column
combine.levels  Combine infrequent levels of a categorical variable
comment         Attach a comment attribute to an object:
                    comment(fit) <- 'Used old data'
                    comment(fit)   # prints comment
confbar         Draws confidence bars on an existing plot using multiple
                    confidence levels distinguished using color or gray scale
contents        Print the contents (variables, labels, etc.) of a data frame
cpower          Power of Cox 2-sample test allowing for noncompliance
Cs              Vector of character strings from list of unquoted names
csv.get         Enhanced importing of comma separated files labels
cut2            Like cut with better endpoint label construction and allows
                    construction of quantile groups or groups with given n
datadensity     Snapshot graph of distributions of all variables in
                    a data frame.  For continuous variables uses scat1d.
dataRep         Quantify representation of new observations in a database
ddmmmyy         SAS "date7" output format for a chron object
deff            Kish design effect and intra-cluster correlation
describe        Function to describe different classes of objects.
                    Invoke by saying describe(object). It calls one of the
                    following:
describe.data.frame
                Describe all variables in a data frame (generalization
                    of SAS UNIVARIATE)
describe.default
                Describe a variable (generalization of SAS UNIVARIATE)
do              Assists with batch analyses
dot.chart       Dot chart for one or two classification variables
Dotplot         Enhancement of Trellis dotplot allowing for matrix
                    x-var., auto generation of Key function, superposition
drawPlot        Simple mouse-driven drawing program, including a function
                    for fitting Bezier curves
ecdf            Empirical cumulative distribution function plot
eip             Edit an object "in-place" (may be dangerous!), e.g.
                    eip(sqrt) will replace the builtin sqrt function
errbar          Plot with error bars (Charles Geyer, U. Chi., mod FEH)
event.chart     Plot general event charts (Jack Lee, jjlee@mdanderson.org, 
                    Ken Hess, Joel Dubin; Am Statistician 54:63-70,2000)
event.history	Event history chart with time-dependent cov. status
                    (Joel Dubin, joel.dubin@yale.edu)
find.matches    Find matches (with tolerances) between columns of 2 matrices
first.word      Find the first word in an S expression (R Heiberger)
fit.mult.impute Fit most regression models over multiple transcan imputations,
                    compute imputation-adjusted variances and avg. betas
format.df       Format a matrix or data frame with much user control
                    (R Heiberger and FE Harrell)
ftupwr          Power of 2-sample binomial test using Fleiss, Tytun, Ury
ftuss           Sample size for 2-sample binomial test using  "  "  "  "
                    (Both by Dan Heitjan, dheitjan@biostats.hmc.psu.edu)
gbayes          Bayesian posterior and predictive distributions when both
                the prior and the likelihood are Gaussian
getHdata        Fetch and list datasets on our web site
gs.slide        Sets nice defaults for graph sheets for S-Plus 4.0 for
                copying graphs into Microsoft applications
hdquantile      Harrell-Davis nonparametric quantile estimator with s.e.
histbackback    Back-to-back histograms (Pat Burns, Salomon Smith
                    Barney, London, pburns@dorado.sbi.com)
hist.data.frame Matrix of histograms for all numeric vars. in data frame
                    Use hist.data.frame(data.frame.name)
histSpike       Add high-resolution spike histograms or density estimates
                    to an existing plot
hoeffd          Hoeffding's D test (omnibus test of independence of X and Y)
impute          Impute missing data (generic method)
%in%            Find out which elements a are in b : a %in% b
interaction     More flexible version of builtin function
is.present      Tests for non-blank character values or non-NA numeric values
james.stein     James-Stein shrinkage estimates of cell means from raw data
km.quick        Quick computation of Kaplan-Meier estimates without strata
labcurve        Optimally label a set of curves that have been drawn on
                    an existing plot, on the basis of gaps between curves.
                    Also position legends automatically at emptiest rectangle.
label           Set or fetch a label for an S-object
Lag             Lag a vector, padding on the left with NA or ''
latex           Convert an S object to LaTeX (R Heiberger & FE Harrell)
ldBands         Lan-DeMets bands for group sequential tests
list.tree       Pretty-print the structure of any data object
                    (Alan Zaslavsky, zaslavsk@hcp.med.harvard.edu)
mask            8-bit logical representation of a short integer value
                    (Rick Becker)
matchCases      Match each case on one continuous variable
matxv           Fast matrix * vector, handling intercept(s) and NAs
mem             mem() types quick summary of memory used during session
mgp.axis        Version of axis() that uses appropriate mgp from 
                    mgp.axis.labels and gets around bug in axis(2, ...)
                    that causes it to assume las=1
mgp.axis.labels
                Used by survplot and plot in Design library (and other
                    functions in the future) so that different spacing
                    between tick marks and axis tick mark labels may be
                    specified for x- and y-axes.  ps.slide, win.slide,
                    gs.slide set up nice defaults for mgp.axis.labels.
                    Otherwise use mgp.axis.labels('default') to set defaults.
                    Users can set values manually using 
                    mgp.axis.labels(x,y) where x and y are 2nd value of
                    par('mgp') to use.  Use mgp.axis.labels(type=w) to
                    retrieve values, where w='x', 'y', 'x and y', 'xy',
                    to get 3 mgp values (first 3 types) or 2 mgp.axis.labels.
minor.tick      Add minor tick marks to an existing plot
mtitle          Add outer titles and subtitles to a multiple plot layout
mulbar.chart    Multiple bar chart for one or two classification variables
na.delete       Functions for handling NAs in models
na.detail.response
na.keep
%nin%           Opposite of %in%
nomiss          Return a matrix after excluding any row with an NA
panel.bpplot    Panel function for trellis bwplot - box-percentile plots
panel.plsmo     Panel function for trellis xyplot - uses plsmo
pc1             Compute first prin. component and get coefficients on
                    original scale of variables
plotCorrPrecision  Plot precision of estimate of correlation coefficient
plsmo           Plot smoothed x vs. y with labeling and exclusion of NAs
                    Also allows a grouping variable and plots unsmoothed data
popower         Power and sample size calculations for ordinal responses
                    (two treatments, proportional odds model)
prn             prn(expression) does print(expression) but titles the
                    output with 'expression'.  Do prn(expression,txt) to add
                    a heading ('txt') before the 'expression' title
p.sunflowers    Sunflower plots (Andreas Ruckstuhl, Werner Stahel,
                    Martin Maechler, Tim Hesterberg)
ps.slide        Set up postcript() using nice defaults for different types
                    of graphics media
pstamp          Stamp a plot with date in lower right corner (pstamp())
                    Add ,pwd=T and/or ,time=T to add current directory 
                     name or time
                    Put additional text for label as first argument, e.g.
                    pstamp('Figure 1')  will draw 'Figure 1  date'
putKey          Different way to use key()
putKeyEmpty     Put key at most empty part of existing plot
rcorr           Pearson or Spearman correlation matrix with pairwise deletion
                    of missing data
rcorr.cens      Somers' Dyx rank correlation with censored data
rcorrp.cens     Assess difference in concordance for paired predictors
rcspline.eval   Evaluate restricted cubic spline design matrix
rcspline.plot   Plot spline fit with nonparametric smooth and grouped estimates
rcspline.restate
                Restate restricted cubic spline in unrestricted form, and
                    create TeX expression to print the fitted function
recode          Recodes variables
reorder.factor  Reorder levels of factor var. by values of another var.
reShape         Reshape a matrix into 3 vectors, reshape serial data
rm.boot         Bootstrap spline fit to repeated measurements model,
                    with simultaneous confidence region - least
                    squares using spline function in time
rMultinom       Generate multinomial random variables with varying prob.
samplesize.bin  Sample size for 2-sample binomial problem
                    (Rick Chappell, chappell@stat.wisc.edu)
sas.get         Convert SAS dataset to S data frame
sasxport.get    Enhanced importing of SAS transport dataset in R
scat1d          Add 1-dimensional scatterplot to an axis of an existing plot
                    (like bar-codes, FEH/Martin Maechler, 
                    maechler@stat.math.ethz.ch/Jens Oehlschlaegel-Akiyoshi,
                    oehl@psyres-stuttgart.de)
score.binary    Construct a score from a series of binary variables or
                    expressions
sedit           A set of character handling functions written entirely
                    in S.  sedit() does much of what the UNIX sed
                    program does.  Other functions included are
                    substring.location, substring<-, replace.string.wild,
                    and functions to check if a string is numeric or
                    contains only the digits 0-9
setpdf          Adobe PDF graphics setup for including graphics in books
                    and reports with nice defaults, minimal wasted space
setps           Postscript graphics setup for including graphics in books
                    and reports with nice defaults, minimal wasted space
                    Internally uses psfig function by
                    Antonio Possolo (antonio@atc.boeing.com).
                    setps works with Ghostscript to convert .ps to .pdf
setTrellis      Set Trellis graphics to use blank conditioning panel strips,
                    line thickness 1 for dot plot reference lines: 
                    setTrellis(); 3 optional arguments
show.col        Show colors corresponding to col=0,1,...,99
show.pch        Show all plotting characters specified by pch=.
                    Just type show.pch() to draw the table on the 
                    current device.  
showPsfrag      Use LaTeX to compile, and dvips and ghostview to
                   display a postscript graphic containing psfrag strings
solvet          Version of solve with argument tol passed to qr
somers2         Somers' rank correlation and c-index for binary y
spearman        Spearman rank correlation coefficient  spearman(x,y)
spearman.test   Spearman 1 d.f. and 2 d.f. rank correlation test
spearman2       Spearman multiple d.f. rho^2, adjusted rho^2, Wilcoxon-Kruskal-
                    Wallis test, for multiple predictors
spower          Simulate power of 2-sample test for survival under
                    complex conditions
                    Also contains the Gompertz2,Weibull2,Lognorm2 functions.
spss.get        Enhanced importing of SPSS files using R's read.spss function
src             src(name) = source("name.s") with memory
store           store an object permanently (easy interface to assign function)
strmatch        Shortest unique identifier match 
                    (Terry Therneau, therneau@mayo.edu)
substi          Substitute one var for another when observations NA
summarize       Generate a data frame containing stratified summary
                    statistics.  Useful for passing to trellis.
summary.formula General table making and plotting functions for summarizing
                    data
symbol.freq     X-Y Frequency plot with circles' area prop. to frequency
sys             Execute unix() or dos() depending on what's running
tex             Enclose a string with the correct syntax for using
                   with the LaTeX psfrag package, for postscript graphics
transace        ace() packaged for easily automatically transforming all
                    variables in a matrix
transcan        automatic transformation and imputation of NAs for a
                    series of predictor variables
trap.rule       Area under curve defined by arbitrary x and y vectors,
                using trapezoidal rule
trellis.strip.blank
                To make the strip titles in trellis more visible, you can 
                    make the backgrounds blank by saying trellis.strip.blank().
                    Use before opening the graphics device.
t.test.cluster  2-sample t-test for cluster-randomized observations
uncbind         Form individual variables from a matrix
units           Set or fetch "units" attribute - units of measurement for var.
upData          Update a data frame (change names, labels, remove vars, etc.)
varclus         Graph hierarchical clustering of variables using squared
                Pearson or Spearman correlations or Hoeffding D as similarities
                Also includes the naclus function for examining similarities in
                patterns of missing values across variables.
xy.group        Compute mean x vs. function of y by groups of x
xYplot          Like trellis xyplot but supports error bars and multiple
                    response variables that are connected as separate lines
whichClosePW    Weighted sampling of close elements in a vector
whichClosest    Find the closest element in a vector
wtd.mean, wtd.var, wtd.quantile, wtd.ecdf, wtd.table, wtd.rank,
wtd.loess.noiter, num.denom.setup
                Set of function for obtaining weighted estimates
zoom            Zoom in on any graphical display
                    (Bill Dunlap, bill@statsci.com)