GVFC

 Vector of length s that contains a count for each segment 

counts

 Number of positive segment counts needed before counting stops 


The function considers the counts per segment and uses them sequentially until <code>d</code> positive counts
are obtained or until all <code>s</code> segments have been considered. If we assume that <code>u</code> counts are used (of
which some may be zero) then
the visual fast count estimator is the mean over the <code>u</code> counts multiplied by <code>s</code>. This function is used
by <code><a rd-options="" href="/link/GVFCMOM?package=emon&version=1.3" data-mini-rdoc="emon::GVFCMOM">GVFCMOM</a></code> to obtain the method of moments VFC estimator - which has reduced bias compared to the
raw VFC estimator.


Statistical tools for environmental and ecological surveys.
Simulation-based power and precision analysis; detection probabilities from
different survey designs; visual fast count estimation.

Jon Barry

emon

Tools for Environmental and Ecological Survey Design

GVFC function


The function considers the counts per segment and uses them sequentially until <code>d</code> positive counts
are obtained or until all <code>s</code> segments have been considered. If we assume that <code>u</code> counts are used (of
which some may be zero) then
the visual fast count estimator is the mean over the <code>u</code> counts multiplied by <code>s</code>. This function is used
by <code><a rd-options='' href='GVFCMOM'>GVFCMOM</a></code> to obtain the method of moments VFC estimator - which has reduced bias compared to the
raw VFC estimator.


GVFC: Calculates the raw Visual Fast Count (VFC) estimator of the mean abundance per transect

Description

Usage

Arguments

Value

References

See Also