agop (version 0.2-2)

rpareto2: Pareto Type-II (Lomax) Distribution

Description

Density, cumulative distribution function, quantile function, and random generation for the Pareto Type-II (Lomax) distribution with shape parameter \(k>0\) and scale parameter \(s>0\).

[TO DO: rewrite in C, add NA handling]

Usage

rpareto2(n, k = 1, s = 1)

ppareto2(q, k = 1, s = 1, lower.tail = TRUE)

qpareto2(p, k = 1, s = 1, lower.tail = TRUE)

dpareto2(x, k = 1, s = 1)

Arguments

n

integer; number of observations

k

vector of shape parameters, \(k>0\)

s

vector of scale parameters, \(s>0\)

lower.tail

logical; if TRUE (default), probabilities are \(P(X \le x)\), and \(P(X > x)\) otherwise

p

vector of probabilities

x, q

vector of quantiles

Value

numeric vector; dpareto2 gives the density, ppareto2 gives the cumulative distribution function, qpareto2 calculates the quantile function, and rpareto2 generates random deviates.

Details

If \(X\sim\mathrm{P2}(k,s)\), then \(\mathrm{supp}\,X=[0,\infty)\). The c.d.f. for \(x\ge 0\) is given by $$F(x)=1-s^k/(s+x)^k$$ and the density by $$f(x)=k s^k/(s+x)^{k+1}.$$

See Also

Other distributions: rdpareto2

Other Pareto2: pareto2_estimate_mle, pareto2_estimate_mmse, pareto2_test_ad, pareto2_test_f