Probability distributions

R makes it very easy to plot and get statistical information on many probability distributions. For those who are not familiar with probability distributions, they are defined as a table or an equation that links each outcome of a statistical experiment with its probability of occurrence. A summary of many common probability distributions available in R is available in the following table:

Probability distribution	R name
Beta	beta
Binomial	binom
Cauchy	cauchy
Chi square	chisq
Exponential	exp
F	f
Gamma	gamma
Geometric	geom
Hypergeometric	hyper
Logistic	logis
Lognormal	lnorm
Negative Binomial	nbinom
Normal	norm
Poisson	pois
Student t	t
Uniform	unif
Tukey	tukey
Weibull	weib
Wilcoxon	wilcox

You can also get this summary in R by entering help("distributions"). For additional probability distributions, and the packages needed to load them, you can consult the CRAN distributions page at http://cran.r-project.org/web/views...