simecol (version 0.5-5)

initialize-methods: Methods for Function `initialize' in Package `simecol'

Description

This function is used to initialize objects derived from the simObj superclass.

Usage

## S3 method for class 'simObj':
initialize(.Object, \dots)

Arguments

.Object

The simObj instance which is to be re-initialized.

...

Provided for compatibility with the default method of initialize, or slots of the object which is to be created (in case of new)

See Also

simObj, new

Examples

# Note: new calls initialize and initialize calls initfunc(obj)
    lv_efr <- new("odeModel",
      main = function (time, init, parms, ...) {
        x <- init
        p <- parms
        S <- approxTime1(inputs, time, rule=2)["s.in"]
        dx1 <-   S * p["k1"] * x[1] - p["k2"] * x[1] * x[2]
        dx2 <-     - p["k3"] * x[2] + p["k2"] * x[1] * x[2]
        list(c(dx1, dx2))
      },
      parms  = c(k1=0.2, k2=0.2, k3=0.2),
      times  = c(from=0, to=100, by=0.5),
      init   = c(prey=0.5, predator=1),
      solver = "rk4",
      initfunc = function(obj) {
        tt <- fromtoby(times(obj))
        inputs(obj) <- as.matrix(data.frame(
                time = tt,
                s.in = pmax(rnorm(tt, mean=1, sd=0.5), 0)
              ))
        obj
      }
    )

    plot(sim(lv_efr))           # first call
    plot(sim(lv_efr))           # same figure with identical object

    lv_efr<- initialize(lv_efr) # re-initializes, new random inputs
    plot(sim(lv_efr))           # different figure