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restorePar

Get Actual Parameters from Scaled Values

Description

Restore scaled parameters to their original units. Used in minimization by calcMin.

Usage

restorePar(S,pvec)

Arguments

S

scaled parameter vector.
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).

Details

Restoration algorithm: P = Pmin + (Pmax - Pmin) (sin(pi*S/2))^2

Value

Parameter vector converted from scaled units to original units specified by pvec.

Author(s)

Jon T. Schnute, Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo BC

See Also

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    <- c(.5,.5,.5)
  P    <- restorePar(S,pvec)
  print(cbind(pvec,S,P))
})
PBSmodelling

GUI Tools Made Easy: Interact with Models and Explore Data

v2.68.8
GPL (>= 2)
Authors
Jon T. Schnute [aut], Alex Couture-Beil [aut], Rowan Haigh [aut, cre], Nicholas Boers [ctb], Anisa Egeli [ctb], A. R. Kronlund [ctb], Steve Martell [ctb], Norm Olsen [ctb]
Initial release
2019-03-12

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