Tools for Environmental and Ecological Survey Design

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Documentation for package ‘emon’ version 1.3.2

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emon-package Tools for environmental and ecological survey design and analysis
addnoise Creates random errors for use in power.trend.
detect Probability of circular patch detection
detect.prop Probability of detecting a feature that covers a proportion 'theta' of the survey area.
emon Tools for environmental and ecological survey design and analysis
expected.nb Expected value of Visual Fast Count Estimator assuming Negative Binomial distribution for counts
expected.pois Expected value of Visual Fast Count Estimator assuming Poisson distribution for counts
fS.detect Used in the function detect
fT.detect Used in function detect
generate.trend Generates a set of mean values.
GVFC Calculates the raw Visual Fast Count (VFC) estimator of the mean abundance per transect
GVFCMOM Function to calculate the method of moments visual fast count estimator
is.wholenumber To check whether an argument is an integer
mannkendall Mann-kendall test for trend
mannkendall.stat Mann-Kendall statistic.
mom.min.nb Minimising function for VFC MOM estimator assuming Negative Binomial counts.
mom.min.pois Minimising function for VFC MOM estimator assuming Poisson counts.
n.min Minimising function used in 'precision'.
permute.BACI Does non-parametric randomisation test for the interaction term in a BACI design.
permute.groups Does randomisation test for the difference in means of two vectors 'v1' and 'v2'.
power.BACI Calculates power for a Before and After Control Impact (BACI) design.
power.groups Power for comparing mean of two groups
power.trend Calculates power by simulation to detect a specified trend.
precision Sample size for given precision or precision for given sample size
size2.samevar Calculates negative binomial size to preserve constant variance.
svariog Calculates empirical semi-variogram.