parmat function

Create a matrix of parameters

parmat is a utility that makes a vector of parameters suitable for use in pomp functions.

parmat(params, ...)

## S4 method for signature 'numeric'
parmat(params, nrep = 1, ..., names = NULL)

## S4 method for signature 'array'
parmat(params, nrep = 1, ..., names = NULL)

## S4 method for signature 'data.frame'
parmat(params, nrep = 1, ...)

Arguments

• params: named numeric vector or matrix of parameters.
• ...: additional arguments, currently ignored.
• nrep: number of replicates (columns) desired.
• names: optional character; column names.

Returns

parmat returns a matrix consisting of nrep copies of params.

Examples

# takes too long for R CMD check
  ## generate a bifurcation diagram for the Ricker map
  p <- parmat(coef(ricker()),nrep=500)
  p["r",] <- exp(seq(from=1.5,to=4,length=500))
  trajectory(
    ricker(),
    times=seq(from=1000,to=2000,by=1),
    params=p,
    format="array"
  ) -> x
  matplot(p["r",],x["N",,],pch='.',col='black',
    xlab=expression(log(r)),ylab="N",log='x')

Author(s)

Aaron A. King