# Main Package of Venables and Ripley's MASS

## Documentation for package ‘MASS’ version 7.2-45

## Help Pages

A B C D E F G H I K L M N O P Q R S T U V W misc

.rat | Rational Approximation

## -- A --

abbey | Determinations of Nickel Content
accdeaths | Accidental Deaths in the US 1973-1978
addterm | Try All One-Term Additions to a Model
Aids2 | Australian AIDS Survival Data
Animals | Brain and Body Weights for 28 Species
anorexia | Anorexia Data on Weight Change
anova.negbin | Likelihood Ratio Tests for Negative Binomial GLMs
area | Adaptive Numerical Integration
as.character.fractions | Rational Approximation
as.fractions | Rational Approximation

## -- B --

bacteria | Presence of Bacteria after Drug Treatments
bandwidth.nrd | Bandwidth for density() via Normal Reference Distribution
bcv | Biased Cross-Validation for Bandwidth Selection
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
Boston | Housing Values in Suburbs of Boston
boxcox | Box-Cox Transformations for Linear Models

## -- C --

cabbages | Data from a cabbage field trial
caith | Colours of Eyes and Hair of People in Caithness
Cars93 | Data from 93 Cars on Sale in the USA in 1993
cats | Anatomical Data from Domestic Cats
cement | Heat Evolved by Setting Cements
chem | Copper in Wholemeal Flour
coef.fitdistr | Maximum-likelihood Fitting of Univariate Distributions
coef.lda | Linear Discriminant Analysis
con2tr | Convert Lists to Data Frames for use by Lattice
confint.glm | Confidence Intervals for Model Parameters
confint.nls | Confidence Intervals for Model Parameters
confint.profile.glm | Confidence Intervals for Model Parameters
confint.profile.nls | Confidence Intervals for Model Parameters
contr.sdif | Successive Differences contrast coding
coop | Co-operative Trial in Analytical Chemistry
corresp | Simple Correspondence Analysis
cov.mcd | Resistant Estimation of Multivariate Location and Scatter
cov.mve | Resistant Estimation of Multivariate Location and Scatter
cov.rob | Resistant Estimation of Multivariate Location and Scatter
cov.trob | Covariance Estimation for Multivariate t Distribution
cpus | Performance of Computer CPUs
crabs | Morphological Measurements on Leptograpsus Crabs
Cushings | Diagnostic Tests on Patients with Cushing's Syndrome

## -- D --

DDT | DDT in Kale
deaths | Monthly Deaths from Lung Diseases in the UK
denumerate | Transform an Allowable Formula for 'loglm' into one for 'terms'
dose.p | Predict Doses for Binomial Assay model
drivers | Deaths of Car Drivers in Great Britain 1969-84
dropterm | Try All One-Term Deletions from a Model

## -- E --

eagles | Foraging Ecology of Bald Eagles
epil | Seizure Counts for Epileptics
eqscplot | Plots with Geometrically Equal Scales
extractAIC.gls | Choose a model by AIC in a Stepwise Algorithm
extractAIC.lme | Choose a model by AIC in a Stepwise Algorithm

## -- F --

family.negbin | Fit a Negative Binomial Generalized Linear Model
farms | Ecological Factors in Farm Management
fgl | Measurements of Forensic Glass Fragments
fitdistr | Maximum-likelihood Fitting of Univariate Distributions
forbes | Forbes' Data on Boiling Points in the Alps
fractions | Rational Approximation

## -- G --

GAGurine | Level of GAG in Urine of Children
galaxies | Velocities for 82 Galaxies
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
gehan | Remission Times of Leukaemia Patients
genotype | Rat Genotype Data
geyser | Old Faithful Geyser Data
gilgais | Line Transect of Soil in Gilgai Territory
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

## -- H --

hills | Record Times in Scottish Hill Races
hist.FD | Plot a Histogram with Automatic Bin Width Selection
hist.scott | Plot a Histogram with Automatic Bin Width Selection
housing | Frequency Table from a Copenhagen Housing Conditions Survey
huber | Huber M-estimator of Location with MAD Scale
hubers | Huber Proposal 2 Robust Estimator of Location and/or Scale

## -- I --

immer | Yields from a Barley Field Trial
Insurance | Numbers of Car Insurance claims
is.fractions | Rational Approximation
isoMDS | Kruskal's Non-metric Multidimensional Scaling

## -- K --

kde2d | Two-Dimensional Kernel Density Estimation

## -- L --

lda | Linear Discriminant Analysis
ldahist | Histograms or Density Plots of Multiple Groups
leuk | Survival Times and White Blood Counts for Leukaemia Patients
lm.gls | Fit Linear Models by Generalized Least Squares
lm.ridge | Ridge Regression
lmsreg | Resistant Regression
lmwork | Extract Standardized Residuals from a Linear Model
logLik.fitdistr | Maximum-likelihood Fitting of Univariate Distributions
logLik.negbin | Fit a Negative Binomial Generalized Linear Model
loglm | Fit Log-Linear Models by Iterative Proportional Scaling
logtrans | Estimate log Transformation Parameter
lqs | Resistant Regression
ltsreg | Resistant Regression

## -- M --

mammals | Brain and Body Weights for 62 Species of Land Mammals
Math.fractions | Rational Approximation
mca | Multiple Correspondence Analysis
mcycle | Data from a Simulated Motorcycle Accident
Melanoma | Survival from Malignant Melanoma
menarche | Age of Menarche in Warsaw
michelson | Michelson's Speed of Light Data
minn38 | Minnesota High School Graduates of 1938
model.frame.lda | Linear Discriminant Analysis
model.frame.qda | Quadratic Discriminant Analysis
motors | Accelerated Life Testing of Motorettes
muscle | Effect of Calcium Chloride on Muscle Contraction in Rat Hearts
mvrnorm | Simulate from a Multivariate Normal Distribution

## -- N --

negative.binomial | Family function for Negative Binomial GLMs
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
Null | Null Spaces of Matrices

## -- O --

oats | Data from an Oats Field Trial
OME | Tests of Auditory Perception in Children with OME
Ops.fractions | Rational Approximation

## -- P --

painters | The Painter's Data of de Piles
pairs.lda | Produce Pairwise Scatterplots from an 'lda' Fit
pairs.profile | Plottig Functions for 'profile' Objects
parcoord | Parallel Coordinates Plot
petrol | N. L. Prater's Petrol Refinery Data
phones | Belgium Phone Calls 1950-1973
Pima.te | Diabetes in Pima Indian Women
Pima.tr | Diabetes in Pima Indian Women
Pima.tr2 | Diabetes in Pima Indian Women
plot.lda | Plot Method for Class 'lda'
plot.mca | Plot Method for Objects of Class 'mca'
plot.profile | Plottig Functions for 'profile' Objects
plot.ridgelm | Ridge Regression
polr | Ordered Logistic or Probit Regression
predict.glmmPQL | Predict Method for glmmPQL Fits
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
predict.rlm | Robust Fitting of Linear Models
print.fitdistr | Maximum-likelihood Fitting of Univariate Distributions
print.fractions | Rational Approximation
print.gamma.shape | Estimate the Shape Parameter of the Gamma Distribution in a GLM Fit
print.glm.dose | Predict Doses for Binomial Assay model
print.lda | Linear Discriminant Analysis
print.mca | Multiple Correspondence Analysis
print.qda | Quadratic Discriminant Analysis
print.ridgelm | Ridge Regression
print.rlm | Robust Fitting of Linear Models
print.rms.curv | Relative Curvature Measures for Non-Linear Regression
print.summary.loglm | Summary Method Function for Objects of Class 'loglm'
print.summary.negbin | Summary Method Function for Objects of Class 'negbin'
print.summary.rlm | Summary Method for Robust Linear Models
profile.glm | Method for Profiling glm Objects
psi.bisquare | Robust Fitting of Linear Models
psi.hampel | Robust Fitting of Linear Models
psi.huber | Robust Fitting of Linear Models

## -- Q --

qda | Quadratic Discriminant Analysis
quine | Absenteeism from School in Rural New South Wales

## -- R --

Rabbit | Blood Pressure in Rabbits
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
road | Road Accident Deaths in US States
rotifer | Numbers of Rotifers by Fluid Density
Rubber | Accelerated Testing of Tyre Rubber

## -- S --

sammon | Sammon's Non-Linear Mapping
select | Ridge Regression
Shepard | Kruskal's Non-metric Multidimensional Scaling
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
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
snails | Snail Mortality Data
SP500 | Returns of the Standard and Poors 500
stdres | Extract Standardized Residuals from a Linear Model
steam | The Saturated Steam Pressure Data
stepAIC | Choose a model by AIC in a Stepwise Algorithm
stormer | The Stormer Viscometer Data
studres | Extract Studentized Residuals from a Linear Model
Summary.fractions | Rational Approximation
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
survey | Student Survey Data
synth.te | Synthetic Classification Problem
synth.tr | Synthetic Classification Problem

## -- T --

t.fractions | Rational Approximation
terms.gls | Choose a model by AIC in a Stepwise Algorithm
terms.lme | Choose a model by AIC in a Stepwise Algorithm
theta.md | Estimate theta of the Negative Binomial
theta.ml | Estimate theta of the Negative Binomial
theta.mm | Estimate theta of the Negative Binomial
topo | Spatial Topographic Data
Traffic | Effect of Swedish Speed Limits on Accidents
truehist | Plot a Histogram

## -- U --

ucv | Unbiased Cross-Validation for Bandwidth Selection
UScereal | Nutritional and Marketing Information on US Cereals
UScrime | The Effect of Punishment Regimes on Crime Rates

## -- V --

VA | Veteran's Administration Lung Cancer Trial

## -- W --

waders | Counts of Waders at 15 Sites in South Africa
whiteside | House Insulation: Whiteside's Data
width.SJ | Bandwidth Selection by Pilot Estimation of Derivatives
write.matrix | Write a Matrix or Data Frame
wtloss | Weight Loss Data from an Obese Patient

## -- misc --

[.fractions | Rational Approximation