PBSmodelling (version 2.67.266)

scalePar: Scale Parameters to [0,1]

Description

Scale parameters for function minimization by calcMin.

Usage

scalePar(pvec)

Arguments

pvec

a data frame comprising four columns - c("val","min","max","active") and as many rows as there are model parameters. The "active" field (logical) determines whether the parameters are estimated (TRUE) or remain fixed (FALSE).

Value

Parameter vector scaled between 0 and 1.

Details

Scaling algorithm: $ S = (2/pi) asin sqrt((P - Pmin)/(Pmax - Pmin)) $

See Also

restorePar, calcMin, GT0

Examples

local(envir=.PBSmodEnv,expr={
  pvec <- data.frame(val=c(1,100,10000),min=c(0,0,0),max=c(5,500,50000),
    active=c(TRUE,TRUE,TRUE))
  S    <- scalePar(pvec)
  print(cbind(pvec,S))
})