dexp(x, rate = 1) pexp(q, rate = 1) qexp(p, rate = 1) rexp(n, rate = 1)
x q
| vector of quantiles. |
p
| vector of probabilities. |
n
| number of observations to generate. |
rate
| vector of rates. |
rate (i.e., mean 1/rate).
dexp gives the density,
pexp gives the distribution function,
qexp gives the quantile function
and
rexp generates random deviates.
If rate is not specified, it assumes the default value of 1.
The exponential distribution with rate &lambda has density
f(x) = lambda e^(- lambda x)
for x >= 0.exp for the exponential function,
dgamma for the gamma distribution and
dweibull for the Weibull distribution, both of which
generalize the exponential.dexp(1) - exp(-1) #-> 0 r <- rexp(100) all(abs(1 - dexp(1, r) / (r*exp(-r))) < 1e-14)