thetalogistic: Continuous Theta-Logistic Growth
In primer: Functions and Data for the Book, a Primer of Ecology with R

Description Usage Arguments Details Value Author(s) References See Also Examples

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

1	thetalogistic(times, y, parms)

`times`	Times points that will return N
`y`	N
`parms`	a vector of logistic growth parameters

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

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

Hank Stevens (HStevens@muohio.edu)

Sibly, R.M., Barker, D., Denham, M.C., Hone, J., and Pagel, M. (2005) On the regulation of populations of mammals, birds, fish, and insects. Science, 309, 607–610.

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

clogistic

library(deSolve)
p <- c(r=1,alpha=.01, theta=.5)
time <- seq(1,10, by=.1)
initialN <- 10
out <- ode(y=initialN, times=time, func=thetalogistic, parms=p)
plot(time, out[,-1], type='l')