jaccard: Jaccard distance matrix
In prabclus: Functions for Clustering and Testing of Presence-Absence, Abundance and Multilocus Genetic Data
jaccard R Documentation
Jaccard distance matrix
Description
Computes Jaccard distances between the columns of a 0-1-matrix.
Usage
jaccard(regmat)
Arguments
regmat
0-1-matrix. Columns are species, rows are regions.
Details
The Jaccard distance between two species is 1-(number of regions where
both species are present)/(number of regions where at least one
species is present). As a similarity coefficient, this is S22 in
Shi (1993).
Thank you to Laurent Buffat for improving this function!
Value
A symmetrical matrix of Jaccard distances.
Author(s)
Christian Hennig
christian.hennig@unibo.it
https://www.unibo.it/sitoweb/christian.hennig/en
References
Shi, G. R. (1993) Multivariate data analysis in palaeoecology and
palaeobiogeography - a review. Palaeogeography,
Palaeoclimatology, Palaeoecology 105, 199-234.
See Also
kulczynski, dicedist
Examples
options(digits=4)
data(kykladspecreg)
jaccard(t(kykladspecreg))
prabclus documentation built on Sept. 24, 2024, 5:07 p.m.
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| jaccard | R Documentation |
Jaccard distance matrix
Description
Computes Jaccard distances between the columns of a 0-1-matrix.
Usage
jaccard(regmat)
Arguments
regmat |
0-1-matrix. Columns are species, rows are regions. |
Details
The Jaccard distance between two species is 1-(number of regions where both species are present)/(number of regions where at least one species is present). As a similarity coefficient, this is S22 in Shi (1993).
Thank you to Laurent Buffat for improving this function!
Value
A symmetrical matrix of Jaccard distances.
Author(s)
Christian Hennig christian.hennig@unibo.it https://www.unibo.it/sitoweb/christian.hennig/en
References
Shi, G. R. (1993) Multivariate data analysis in palaeoecology and palaeobiogeography - a review. Palaeogeography, Palaeoclimatology, Palaeoecology 105, 199-234.
See Also
kulczynski, dicedist
Examples
options(digits=4)
data(kykladspecreg)
jaccard(t(kykladspecreg))
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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