R in a Nutshell, 2nd Edition

Distribution Function Families

Here is a table showing the probability distribution functions available in R. In addition to the arguments listed above that are common to each type of function, there are also some arguments that are common to each family.

Family	PDF or PMF	R functions	Family arguments
Beta		dbeta, pbeta, qbeta, rbeta	shape1, shape2, ncp = 0
Binomial		dbinom, pbinom, qbinom, rbinom	size, prob
Birthday		pbirthday, qbirthday	classes, coincident
Cauchy		dcauchy, pcauchy, qcauchy, rcauchy	location, scale
Chi-squared		dchisq, pchisq, qchisq, rchisq	df, ncp=0
Exponential		dexp, pexp, qexp, rexp	rate
F-distribution		df pf qf rf	df1, df2, ncp
Gamma		dgamma, pgamma, qgamma, rgamma	shape, rate=1, scale=1/rate
Geometric		dgeom, pgeom, qgeom, rgeom	prob
Hypergeometric		dhyper, phyper, qhyper, rhyper	m, n, k (and ...