makeStart: Initial Parameter Values

In secr: Spatially Explicit Capture-Recapture

Initial Parameter Values

Description

makeStart() wraps the code previously internal to secr.fit(). It will not usually be called directly.

Usage

makeStart(start = NULL, parindx, capthist, mask, detectfn, link, 
    details = NULL, fixed = NULL, CL = FALSE, anypoly = FALSE, 
    anytrans = FALSE, alltelem = FALSE, sighting = FALSE)

Arguments

start	optional starting values as described for secr.fit
parindx	list with one component per real parameter giving corresponding indices of coefficients (beta parameters)
capthist	capthist object including capture data and detector (trap) layout
mask	mask object or (for a multi-session analysis) a list of mask objects, one for each session
detectfn	integer code or character string for shape of detection function 0 = halfnormal, 1 = hazard rate etc. – see detectfn
link	list of link function names ("log", "logit", "identity") for each real parameter
details	list of additional arguments (see secr.fit)
fixed	list with optional components corresponding to real parameters giving the scalar value to which the parameter is to be fixed
CL	logical, if true then model does not include density
anypoly	logical, TRUE if any polygon detectors
anytrans	logical, TRUE if any transect detectors
alltelem	logical, TRUE if any telemetry detectors
sighting	logical, TRUE if any sighting data

Details

If ‘start’ is a previously fitted model then only ‘start’ and ‘parindx’ are required.

Value

Numeric vector with one value for each coefficient (beta parameter) in model.

See Also

secr.fit

Examples

makeStart(secrdemo.0, list(D = 1, g0 = 2:3, sigma = 4))

secr documentation built on Oct. 18, 2023, 1:07 a.m.