dDoubleExponentialGrowth: Double Exponential Growth Model
Description
Density and random generation of an exponential growth model distribution.
Usage
dDoubleExponentialGrowth(x, a, b, r1, r2, mu, log)
rDoubleExponentialGrowth(n, a, b, r1, r2, mu)
Value
For dDoubleExponentialGrowth: the probability (or likelihood) or log probability of an observed date x (in Cal BP). For rDoubleExponentialGrowth a simulated date in Cal BP.
Arguments
x
vector of calendar years (in BP).
a
lower (earliest) limit of the distribution (in BP).
b
upper (latest) limit of the distribution (in BP).
r1
growth rate before change point mu.
r2
growth rate after change point mu.
mu
change point (in BP).
log
TRUE or 1 to return log probability. FALSE or 0 to return probability.
n
number of random draws. Currently only n = 1 is supported, but the argument exists for standardization of "r" functions.