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qfasar  

Quantitative Fatty Acid Signature Analysis in R
View on CRAN: Click here


Download and install qfasar package within the R console
Install from CRAN:
install.packages("qfasar")

Install from Github:
library("remotes")
install_github("cran/qfasar")

Install by package version:
library("remotes")
install_version("qfasar", "1.2.1")



Attach the package and use:
library("qfasar")
Maintained by
Jeffrey F. Bromaghin
[Scholar Profile | Author Map]
All associated links for this package
First Published: 2016-08-25
Latest Update: 2020-03-19
Description:
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.
How to cite:
Jeffrey F. Bromaghin (2016). qfasar: Quantitative Fatty Acid Signature Analysis in R. R package version 1.2.1, https://cran.r-project.org/web/packages/qfasar. Accessed 25 Oct. 2026.
Previous versions and publish date:
(2026-07-09 06:45), 1.0.0 (2016-08-25 10:01), 1.1.0 (2016-10-25 10:31), 1.1.1 (2016-12-02 22:37), 1.2.0 (2017-01-10 00:04), 1.2.1 (2020-03-19 22:30)
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