mefa4: multivariate data handling with S4 classes and sparse matrices

An S4 update of the mefa package using sparse matrices for enhanced efficiency. Sparse array-like objects are supported via lists of sparse matrices.

• Main functions: Xtab, Mefa.
• Accessor and replacement functions: xtab, samp, taxa.
• Methods: mbind, groupSums, groupMeans.

See tutorial with design decisions and performance comparisons (Rmd, PDF)

Versions

Install CRAN version as:

install.packages("mefa4")

Install development version from GitHub:

library(devtools)
install_github("psolymos/mefa4")

User visible changes are listed in the NEWS file.

Previously hosted at R-Forge (until rev 619).

Report a problem

Use the issue tracker to report a problem.

License

GPL-2

References

Solymos P. 2008. mefa: an R package for handling and reporting count data. Community Ecology 9, 125-127. (PDF)

Solymos P. 2009. Processing ecological data in R with the mefa package. Journal of Statistical Software 29(8), 1-28. DOI: 10.18637/jss.v029.i08