Description
Estimate Smooth and Linear Trends from Population Count Survey Data.
Description
Functions to estimate and plot smooth or linear population trends, or population indices, from animal or plant count survey data.
README.md
poptrend
poptrend is an R package for estimating simple population trends from count survey data using Generalized Additive Mixed Models (GAMM). The package uses mgcv as the model fitting engine and provides methods for plotting trends, and computing indices and estimates of population change.
Installation
CRAN version
The main version of poptrend is available from CRAN and can be installed from R by running
install.packages("poptrend")
Development version
Alternatively, the most recent development version can be installed directly from Github. To do so, first install the devtools package:
install.packages("devtools")
Then run:
library(devtools)
install_github("jknape/poptrend")