primer (version 1.2.0)

clogistic: Continuous Logistic Growth

Description

A function for continuous logistic growth, for use with ode in the deSolve package.

Usage

clogistic(times, y, parms)

Arguments

times

times points that will return N

y

N

parms

a vector of logistic growth parameters; the first must be r, and the second must be alpha (1/K).

Value

Returns of list of one component (required by ode).

Details

The user does not put these directly into this function, but rather uses ode in the deSolve package.

The function implements the logistic growth equation $$\frac{dN}{dt} = rN\left(1-\alpha N\right)$$ or equivalently $$\frac{dN}{dt} = rN\left(\frac{K-N}{K}\right)$$

References

Stevens. M.H.H. (2009) A Primer of Ecology with R. Use R! Series. Springer.

See Also

dlogistic, thetalogistic, levins, lvcomp2, lvcompg

Examples

# NOT RUN {
library(deSolve)
p <- c(r=1, alpha=.01)
time <- 1:10
initialN <- 10
out <- ode(y=initialN, times=time,
             func=clogistic, parms=p)
plot(time, out[,-1], type='l')

# }