An R Function Reference

Following is an alphabetical list of procedures you may wish to carry out,
along with some of the associated functions that may be helpful in that
respect. This should in NO WAY be considered a complete listing of R functions!
Only functions in the base R default installation are included here (and even
as such the list is far from complete). There are MANY more functions and
procedures in the optional packages. To get more information on any of the
functions, just request the help page, e.g., help(mean). This is a plain text
document, so use the back button on your browser to return to the previous
page.

PROCEDURE			FUNCTIONS
-------------------------------------------------------------------------------
absolute value			abs()
addition			sum(), +
analysis of covariance		aov(), lm()
analysis of variance		aov(), anova(), oneway.test(), lm(), manova()
antilogs			exp()
array (creation of)		array()
barplot				barplot()
binomial coefficients		choose()
binomial distribution		dbinom(), pbinom(), qbinom(), rbinom()
binomial test			binom.test()
Box-Cox transformations		boxcox()
boxplot				boxplot()
chi-square distribution		dchisq(), pchisq(), qchisq(), rchisq()
chi-square tests		chisq.test()
combinations			choose()
contingency tables		table(), xtabs()
correlation			cor()
correlation matrix		cor()
correlation significance test	cor.test()
covariance matrix		cor(), cov(), var(), cov2cor()
cross tabulation		xtabs(), table()
data frame (working with)	data.frame(), dim(), names(), str(), summary(),
				attach(), detach(), stack(), etc.
date				date()
deciles				quantile()
descriptive statistics		summary(), fivenum(), by(), tapply()
division			/
exponentiation			^, exp()
F distribution			df(), pf(), qf(), rf()
factorial			factorial()
files (reading in)		load(), read.table(), read.csv(), etc.
files (saving)			save(), write.table(), write.csv(), etc.
Fisher Exact test		fisher.test()
frequency distribution		table(), stem()
Friedman Rank Sum test		friedman.test()
generalized linear models	glm()
help				help(), help.search()
histogram			hist()
homogeneity of variance test	bartlett.test()
interaction line graph		interaction.plot()
interquartile range		IQR()
Kolmogorov-Smirnov test		ks.test()
Kruskal-Wallis test		kruskal.test()
list (creation of)              list()
log linear analysis		loglin(), loglm(), glm()
logarithm			log(), log10(), log2(), exp()
logistic regression		glm()
Mann-Whitney test		wilcox.test()
matrix (creation of)		matrix()
maximum				max(), range(), summary()
mean (arithmetic)		mean()
median				median()
minimum				min(), range(), summary()
mosaic plot			mosaicplot()
multiple regression		lm(), update(), step(), etc.
multiplication			prod(), *
normal distribution		dnorm(), pnorm(), qnorm(), rnorm()
normal probability plot		qqplot(), qqnorm(), qqline()
package management		search(), install.packages(), etc.
percentiles			quantile()
pie chart			pie()
Poisson distribution		dpois(), ppois(), qpois(), rpois()
power calculations		power.prop.test(), power.t.test(), etc.
predictions from a model	predict()
proportions			prop.table()
proportion test			prop.test(), binom.test()
quartiles			quantile(), summary()
quit R				quit()
range				range()
regression (simple linear)	lm()
regression diagnostic plots	plot()
regression line (drawing)	abline()
rounding			round()
sample size			length()
samples, simulation		sample(), rnorm(), etc.
scatterplot			plot(), scatter.smooth()
scatterplot matrix		pairs(), plot()
sequences (regular)		seq()
Shapiro-Wilk test		shapiro.test()
smoothing			plot(density()), scatter.smooth(), lowess()
sorting				sort(), order()
Spearman correlation		cor()
standard deviation		sd()
stem-and-leaf display		stem()
Student's t-test		t.test()
square root			sqrt()
subtraction			diff(), -
t distribution			dt(), pt(), qt(), rt()
t-test				t.test()
tables (working with)		table(), rbind(), cbind(), t(), ftable(), etc.
trig functions			sin(), cos(), tan(), asin(), etc.
Tukey's HSD test		tukeyHSD()
uniform distribution		dunif(), punif(), qunif(), runif()
variance			var()
vector (creation of)		c(), seq(), rep(), scan()
Wilcoxin test			wilcox.test
workspace functions		ls(), objects(), rm(), setwd(), getwd(), etc.