dist_sum_pairwise

A numeric matrix of fatty acid signatures in column-major
format.

sig_data

An integer indicator of the distance measure to compute.
Default value 1.

dist_meas

The power parameter of the chi-square distance measure. Default
value 1.

gamma

The utility function <code>dist_sum_pairwise</code> computes the total distance
between all possible pairs of fatty acid signatures.

An implementation of Quantitative Fatty Acid Signature
Analysis (QFASA) in R.  QFASA is a method of estimating the diet
composition of predators.  The fundamental unit of information in
QFASA is a fatty acid signature (signature), which is a vector of
proportions describing the composition of fatty acids within lipids.
Signature data from at least one predator and from samples of all
potential prey types are required.  Calibration coefficients, which
adjust for the differential metabolism of individual fatty acids by
predators, are also required. Given those data inputs, a predator
signature is modeled as a mixture of prey signatures and its diet
estimate is obtained as the mixture that minimizes a measure of
distance between the observed and modeled signatures.  A variety of
estimation options and simulation capabilities are implemented.
Please refer to the vignette for additional details and references.

dist_sum_pairwise: Distance between pairs of fatty acid signatures

Description

Usage

Arguments

Value

Details