Function to apply `map`

[James Thorson]

Hi all,

Does anyone have code sitting around for a function of the form:

```R

par_list = relist( last.par, map, skeleton_list )

```

where `map` is the conventional tagged list supplied to `MakeADFun`, `skeleton_list` is the original parameter-list (i.e., starting values), `last.par` is the `obj$env$last.par` vector, and `par_list` is the parameter-list (same dimensions as skeleton_list) but with values from `last.par` injected in (and original values from `skeleton_list` when appropriate given `map`)?

This arises because RTMB `MakeTape` does not have a `map` argument, and so it would simplify the process of using RTMB to tape a function that includes fixed values without using a call to `MakeADFun` itself (which does not have as much flexibility e.g., in constructing taping a Jacobian of a derived quantity). 

Jim

[Timothy Miller - NOAA Federal]

Hi Jim,

I think the TMB parList function that can be called from a fitted model (e.g., fit$env$parList()) does what you describe with different arguments, but could be modified for your needs?

Tim

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Timothy J. Miller, PhD

Research Fishery Biologist, Northeast Fisheries Science Center

NOAA Fisheries | U.S. Department of Commerce

Office: (508) 495-2365

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