dssd
is a package for designing distance sampling
surveys. It provides a number of designs including systematic point
transect, parallel line transect, zigzag line transect and segment line
transect designs.
dssd
There are two vignettes within the dssd package to help you get
started using dssd
: - GettingStarted: “Getting Started with
dssd” - MultiStrataVignette: “Multiple Strata in dssd”
dssd
The easiest way to get dssd
is to install it from CRAN
within R-studio or the R interface. We endeavour to make all new
functionality available on CRAN in a timely manor. However, if you wish
to download the development version with the latest updates immediately
you can do this using Hadley Wickham’s devtools
package:
# First, ensure you have a copy of the `devtools` package:
if (!nzchar(system.file(package = "devtools"))) install.packages("devtools")
then install dssd
from github:
library(devtools)
install_github("DistanceDevelopment/dssd", build_vignettes = TRUE)
During installation of packages, you may get the message “These
packages have more recent versions available. It is recommended to
update all of them. Which would you like to update?” and then a list of
packages. We recommend you typically choose the option “CRAN packages
only”. Note you may then get the message that some packages cannot be
installed because they are already loaded. In this case, a solution may
be to note which packages these are, to open an R console (rather than R
Studio) and to use the Packages | Update packages
menu
option (or the update.packages
function) to update these
packages.