mrds: setinitial.ds – R documentation

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setinitial.ds

Set initial values for detection function based on distance sampling

Description

For a given detection function, it computes the initial values for the parameters including scale and shape parameters and adjustment function parameters if any. If there are user-defined initial values only the parameters not specified by the user are computed.

Usage

setinitial.ds(ddfobj, width, initial, point, left)
       sethazard(ddfobj, dmat, width, left, point)

Arguments

`ddfobj`	distance detection function object
`width`	half-width of transect or radius of point count
`initial`	list of user-defined initial values with possible elements: `scale`, `shape`, `adjustment`
`point`	if `TRUE`, point count data; otherwise, line transect data
`left`	left truncation
`dmat`	`xmat` from `ddfobj`

Value

`scale`	vector of initial scale parameter values
`shape`	vector of initial shape parameter values
`adjustment`	vector of initial adjustment function parameter values

Author(s)

Jeff Laake, David L Miller

mrds

Mark-Recapture Distance Sampling

v2.2.4

GPL (>= 2)

Authors

Jeff Laake <jeff.laake@noaa.gov>, David Borchers <dlb@st-and.ac.uk>, Len Thomas <len.thomas@st-and.ac.uk>, David Miller <dave@ninepointeightone.net> and Jon Bishop

Initial release