dexp_rvec: The Exponential Distribution, Using Multiple Draws

Description

Density, distribution function, quantile function and random generation for the exponential distribution, modified to work with rvecs.

Usage

dexp_rvec(x, rate = 1, log = FALSE)
pexp_rvec(q, rate = 1, lower.tail = TRUE, log.p = FALSE)
qexp_rvec(p, rate = 1, lower.tail = TRUE, log.p = FALSE)
rexp_rvec(n, rate = 1, n_draw = NULL)

Value

If any of the arguments are rvecs, or if a value for n_draw is supplied, then an rvec
Otherwise an ordinary R vector.

Arguments

x: Quantiles. Can be an rvec.
rate: Vector of rates. See stats::dexp(). Can be an rvec.
log, log.p: Whether to return results on a log scale. Default is FALSE. Cannot be an rvec.
q: Quantiles. Can be an rvec.
lower.tail: Whether to return \(P[X \le x]\), as opposed to \(P[X > x]\). Default is TRUE. Cannot be an rvec.
p: Probabilities. Can be an rvec.
n: The length of random vector being created. Cannot be an rvec.
n_draw: Number of random draws in the random vector being created. Cannot be an rvec.

Details

Functions dexp_rvec(), pexp_rvec(), pexp_rvec() and rexp_rvec() work like base R functions dexp(), pexp(), qexp(), and rexp(), except that they accept rvecs as inputs. If any input is an rvec, then the output will be too. Function rexp_rvec() also returns an rvec if a value for n_draw is supplied.

dexp_rvec(), pexp_rvec(), pexp_rvec() and rexp_rvec() use tidyverse vector recycling rules:

Vectors of length 1 are recycled
All other vectors must have the same size

Examples

Run this code

x <- rvec(list(c(3, 5.1),
               c(0.1, 2.3)))
dexp_rvec(x, rate = 1.5)
pexp_rvec(x, rate = 1.5)

rexp_rvec(n = 2,
          rate = c(1.5, 4),
          n_draw = 1000)

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