Gravy stands for gradient analysis of vegetation, and was intended to provide general tools for gradient analysis. The main purpose of gravy was to provide functions for fitting so-called HOF models, but here it is superseded by CRAN package eHOF, and after release of eHOF the package development stalled.
Some bits and pieces that may still be useful include:
- Derivatives of HOF functions and Beta diversity assessed as the rate of change of community composition (Oksanen & Tonteri, J. Veg. Sci. 6, 815-824, 1995).
- Assessment of niche overlap of HOF responses (Lawesson & Oksanen, J. Veg. Sci. 13, 279-290, 2002).
- Rescaling of ecological gradients either to constant rate of change of community composition or using Hill's measures of betadiversity.
Package contains C source code and you need a C compiler to build and install the package. If you have such tools and do not want to have full git repository, you can use remotes package in R:
install.packages("remotes")
remotes::install_github("jarioksa/gravy")To install binary version without needing to compile C source code, you can install the package from R-Universe:
install.packages("gravy",
repos =
c("https://jarioksa.r-universe.dev","https://cloud.r-project.org"))