| env.part {TITAN2} | R Documentation |
Partitions environmental gradient for analysis
Description
This function compares the number of records in the environmental vector and the umber of rows in the taxa matrix to ensure they are compatible. It then uses the rank order of environmental values at each sampling location to determine group membership of all sampling sites at each level of partitioning.
Usage
env.part(env, taxa, minSplt = minSplt, messaging = TRUE)
Arguments
env |
A vector of values for each sampling location along the environmental gradient. |
taxa |
A site by taxon matrix containing observed counts at each sampling location. |
minSplt |
The minimum split size used in binary partitioning. The default is to use the argument from the original TITAN function call. |
messaging |
message user? |
Value
A list of seven objects:
- env
an environmental vector
- numUnit
the number of sample units in env
- numTxa
the number of distinct taxonomic units in taxa
- numClass
the number of candidate partitions (numUnit-2*minSplt)
- srtEnv
a sorted version of the environmental vector
- envcls
a vector of environmental values used to distinguish partitions
- eclass
a matrix of group membership relative to each partition in envcls
Author(s)
M. Baker and R. King
References
Baker, ME and RS King. 2010. A new method for detecting and interpreting biodiversity and ecological community thresholds. Methods in Ecology and Evolution 1(1): 25:37.