make_activity_fn

Helper to use a models specified using <code>activity::fitact</code> to fit an
activity model and generate single realisations for bootstrapping with
<code>bootdht</code>.

A simple way of fitting detection functions to distance sampling
data for both line and point transects. Adjustment term selection, left and
right truncation as well as monotonicity constraints and binning are
supported. Abundance and density estimates can also be calculated (via a
Horvitz-Thompson-like estimator) if survey area information is provided. See
Miller et al. (2019) <doi:10.18637/jss.v089.i01> for more information on
methods and <https://examples.distancesampling.org/> for example analyses.

Laura Marshall

Distance

Distance Sampling Detection Function and Abundance Estimation

make_activity_fn function

<dl><dt>...</dt>
<dd>parameters specified by activity::fitact</dd>
<dt>detector_daily_duration</dt>
<dd>by default we assume that detectors were able to detect animals for 24 hours, if they were only able to do this for some proportion of the day (say daylight hours), then adjust this argument accordingly</dd></dl>

Arguments

Author

Multiplier bootstrap helper functions — make_activity_fn

<dl>

<dt>...</dt>
<dd>parameters specified by activity::fitact</dd>


<dt>detector_daily_duration</dt>
<dd>by default we assume that detectors were able to detect animals for 24 hours, if they were only able to do this for some proportion of the day (say daylight hours), then adjust this argument accordingly</dd>

</dl>

make_activity_fn: Multiplier bootstrap helper functions

Description

Usage

Value

Arguments

Author

Details