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/usr/lib/R/library/MASS/INDEX is in r-cran-mass 7.3-45-1.

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The actual contents of the file can be viewed below.

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Functions:
=========

Null                    Null Spaces of Matrices
addterm                 Try All One-Term Additions to a Model
anova.negbin            Likelihood Ratio Tests for Negative Binomial GLMs
area                    Adaptive Numerical Integration
bandwidth.nrd           Bandwidth for density() via Normal Reference
                          Distribution
bcv                     Biased Cross-Validation for Bandwidth Selection
boxcox                  Box-Cox Transformations for Linear Models
con2tr                  Convert Lists to Data Frames for use by lattice
confint-MASS            Confidence Intervals for Model Parameters
contr.sdif              Successive Differences Contrast Coding
corresp                 Simple Correspondence Analysis
cov.rob                 Resistant Estimation of Multivariate Location and
                          Scatter
cov.trob                Covariance Estimation for Multivariate t Distribution
denumerate              Transform an Allowable Formula for 'loglm'
                          into one for 'terms'
dose.p                  Predict Doses for Binomial Assay model
dropterm                Try All One-Term Deletions from a Model
eqscplot                Plots with Geometrically Equal Scales
fitdistr                Maximum-likelihood Fitting of Univariate Distributions
fractions               Rational Approximation
gamma.dispersion        Calculate the MLE of the Gamma Dispersion Parameter
			  in a GLM Fit
gamma.shape             Estimate the Shape Parameter of the Gamma Distribution 
			  in a GLM Fit
ginv                    Generalized Inverse of a Matrix
glm.convert             Change a Negative Binomial fit to a GLM fit
glm.nb                  Fit a Negative Binomial Generalized Linear Model
glmmPQL                 Fit Generalized Linear Mixed Models via PQL
hist.scott              Plot a Histogram with Automatic Bin Width Selection
huber                   Huber M-estimator of Location with MAD Scale
hubers                  Huber Proposal 2 Robust Estimator of Location
                          and/or Scale
isoMDS                  Kruskal's Non-metric Multidimensional Scaling
kde2d                   Two-Dimensional Kernel Density Estimation
lda                     Linear Discriminant Analysis
ldahist                 Histograms or Density Plots of Multiple Groups
lm.gls                  Fit Linear Models by Generalized Least Squares
lm.ridge                Ridge Regression
loglm                   Fit Log-Linear Models by Iterative
                        Proportional Scaling
logtrans                Estimate log Transformation Parameter
lqs			Resistant Regression
mca                     Multiple Correspondence Analysis
mvrnorm                 Simulate from a Multivariate Normal Distribution
negative.binomial       Family function for Negative Binomial GLMs
newcomb                 Newcomb's Measurements of the Passage Time of Light
pairs.lda               Produce Pairwise Scatterplots from an 'lda' Fit
parcoord                Parallel Coordinates Plot
plot.lda                Plot Method for Class 'lda'
plot.mca                Plot Method for Objects of Class 'mca'
polr                    Proportional Odds Logistic Regression
predict.lda             Classify Multivariate Observations by Linear
                          Discrimination
predict.lqs             Predict from an lqs Fit
predict.mca             Predict Method for Class 'mca'
predict.qda             Classify from Quadratic Discriminant Analysis
profile.glm             Method for Profiling glm Objects
qda                     Quadratic Discriminant Analysis
rational                Rational Approximation
renumerate              Convert a Formula Transformed by 'denumerate'
rlm                     Robust Fitting of Linear Models
rms.curv                Relative Curvature Measures for Non-Linear Regression
rnegbin                 Simulate Negative Binomial Variates
sammon                  Sammon's Non-Linear Mapping
stdres                  Extract Standardized Residuals from a Linear Model
stepAIC                 Choose a model by AIC in a Stepwise Algorithm
studres                 Extract Studentized Residuals from a Linear Model
summary.loglm           Summary Method Function for Objects of Class 'loglm'
summary.negbin          Summary Method Function for Objects of Class 'negbin'
summary.rlm             Summary Method for Robust Linear Models
theta.md                Estimate theta of the Negative Binomial by Deviance
theta.ml                Estimate theta of the Negative Binomial by Maximum
			  Likelihood
theta.mm                Estimate theta of the Negative Binomial by Moments
truehist                Plot a Histogram
ucv                     Unbiased Cross-Validation for Bandwidth Selection
width.SJ                Bandwidth Selection by Pilot Estimation of Derivatives
write.matrix            Write a Matrix or Data Frame


Datasets:
========

Aids2                   Australian AIDS Survival Data
Animals                 Brain and Body Weights for 28 Species
Boston                  Housing Values in Suburbs of Boston
Cars93                  Data from 93 Cars on Sale in the USA in 1993
Cushings                Diagnostic Tests on Patients with Cushing's Syndrome
DDT                     DDT in Kale
GAGurine                Level of GAG in Urine of Children
Insurance               Numbers of Car Insurance claims
Melanoma                Survival from Malignant Melanoma
OME                     Tests of Auditory Perception in Children with OME
Pima.tr                 Diabetes in Pima Indian Women
Rabbit                  Blood Pressure in Rabbits
Rubber                  Accelerated Testing of Tyre Rubber
SP500                   Returns of the Standard and Poors 500
Sitka                   Growth Curves for Sitka Spruce Trees in 1988
Sitka89                 Growth Curves for Sitka Spruce Trees in 1989
Skye                    AFM Compositions of Aphyric Skye Lavas
Traffic                 Effect of Swedish Speed Limits on Accidents
UScereal                Nutritional and Marketing Information on US Cereals
UScrime                 The Effect of Punishment Regimes on Crime Rates
VA                      Veteran's Administration Lung Cancer Trial
abbey                   Determinations of Nickel Content
accdeaths               Accidental Deaths in the US 1973-1978
anorexia                Anorexia Data on Weight Change
bacteria                Presence of Bacteria after Drug Treatments
beav1                   Body Temperature Series of Beaver 1
beav2                   Body Temperature Series of Beaver 2
biopsy                  Biopsy Data on Breast Cancer Patients
birthwt                 Risk Factors Associated with Low Infant Birth Weight
cabbages                Data from a cabbage field trial
caith                   Colours of Eyes and Hair of People in Caithness
cats                    Anatomical Data from Domestic Cats
cement                  Heat Evolved by Setting Cements
chem                    Copper in Wholemeal Flour
coop                    Co-operative Trial in Analytical Chemistry
cpus                    Performance of Computer CPUs
crabs                   Morphological Measurements on Leptograpsus Crabs
deaths                  Monthly Deaths from Lung Diseases in the UK
drivers                 Deaths of Car Drivers in Great Britain 1969-84
eagles                  Foraging Ecology of Bald Eagles
epil                    Seizure Counts for Epileptics
farms                   Ecological Factors in Farm Management
fgl                     Measurements of Forensic Glass Fragments
forbes                  Forbes' Data on Boiling Points in the Alps
galaxies                Velocities for 82 Galaxies
gehan                   Remission Times of Leukaemia Patients
genotype                Rat Genotype Data
geyser                  Old Faithful Geyser Data
gilgais                 Line Transect of Soil in Gilgai Territory
hills                   Record Times in Scottish Hill Races
housing                 Frequency Table from a Copenhagen Housing Conditions 
			  Survey
immer                   Yields from a Barley Field Trial
leuk                    Survival Times and White Blood Counts for
                          Leukaemia Patients
mammals                 Brain and Body Weights for 62 Species of Land Mammals
mcycle                  Data from a Simulated Motorcycle Accident
menarche                Age of Menarche in Warsaw
michelson               Michelson's Speed of Light Data
minn38                  Minnesota High School Graduates of 1938
motors                  Accelerated Life Testing of Motorettes
muscle                  Effect of Calcium Chloride on Muscle Contraction
			  in Rat Hearts
newcomb                 Newcomb's Measurements of the Passage Time of Light
nlschools               Eighth-Grade Pupils in the Netherlands
npk                     Classical N, P, K Factorial Experiment
npr1                    US Naval Petroleum Reserve No. 1 data
oats                    Data from an Oats Field Trial
painters                The Painter's Data of de Piles
petrol                  N. L. Prater's Petrol Refinery Data
phones                  Belgium Phone Calls 1950-1973
quine                   Absenteeism from School in Rural New South Wales
road                    Road Accident Deaths in US States
rotifer                 Numbers of Rotifers by Fluid Density
ships                   Ships Damage Data
shoes                   Shoe wear data of Box, Hunter and Hunter
shrimp                  Percentage of Shrimp in Shrimp Cocktail
shuttle                 Space Shuttle Autolander Problem
snails                  Snail Mortality Data
steam                   The Saturated Steam Pressure Data
stormer                 The Stormer Viscometer Data
survey                  Student Survey Data
synth.tr                Synthetic Classification Problem
topo                    Spatial Topographic Data
waders                  Counts of Waders at 15 Sites in South Africa
whiteside               House Insulation: Whiteside's Data
wtloss                  Weight Loss Data from an Obese Patient