dht.deriv

Computes abundance at specified values of parameters for numerical
computation of first derivative with respect to parameters in detection
function. An internal function called by DeltaMethod which is invoked by
dht.se

utility

Animal abundance estimation via conventional, multiple covariate
and mark-recapture distance sampling (CDS/MCDS/MRDS). Detection function
fitting is performed via maximum likelihood. Also included are diagnostics
and plotting for fitted detection functions. Abundance estimation is via a
Horvitz-Thompson-like estimator.

Laura Marshall

mrds

Mark-Recapture Distance Sampling

dht.deriv function

<dl><dt>par</dt>
<dd>detection function parameter values</dd>
<dt>model</dt>
<dd>ddf model object</dd>
<dt>obs</dt>
<dd>observations table</dd>
<dt>samples</dt>
<dd>samples table</dd>
<dt>options</dt>
<dd>list of options as specified in <code>dht</code></dd></dl>

Arguments

Author

Computes abundance estimates at specified parameter values using
Horvitz-Thompson-like estimator — dht.deriv

<dl>

<dt>par</dt>
<dd>detection function parameter values</dd>


<dt>model</dt>
<dd>ddf model object</dd>


<dt>obs</dt>
<dd>observations table</dd>


<dt>samples</dt>
<dd>samples table</dd>


<dt>options</dt>
<dd>list of options as specified in <code>dht</code></dd>

</dl>

dht.deriv: Computes abundance estimates at specified parameter values using Horvitz-Thompson-like estimator

Description

Usage

Value

Arguments

Author

See Also