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simba (version 0.3-2)

A Collection of functions for similarity analysis of vegetation data

Description

Besides functions for the calculation of similarity and multiple plot similarity measures with binary data (for instance presence/absence species data) the package contains some simple wrapper functions for reshaping species lists into matrices and vice versa and some other functions for further processing of similarity data (Mantel-like permutation procedures) as well as some other useful stuff for vegetation analysis.

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Version

Install

install.packages('simba')

Monthly Downloads

9

Version

0.3-2

License

GPL (>= 2)

Homepage

http://www.r-project.org

Maintainer

Gerald Jurasinski

Last Published

August 27th, 2010

Functions in simba (0.3-2)

An adaption of boxplot.n.

A (convenience) wrapper function to make matrix from a data.frame

Calculate the area under a line(curve).

Calculate similarity of plots based on slope aspect and inclination

Obtain Direction Classes from Geographic Coordinates

Create artificial data set (species matrix).

Calculate a binary similarity index you define.

Transform Braun-Blanquet scale data to percentage cover values and vice versa

Calculate similarity measures for binary data

Calculate the distance between the instances or variables of two similar data-sets.

Produces the nodes of an equidistant grid.

Calculate similarities for binary vegetation data

Repeated vegetation records from 7 Alpine summits of the Bernina range.

Track species occurrence

Display Package Documentation

Calculate the difference in parameters of a Michaelis-Menten kinetik fitted to (PAM) data

plot an mrpp-object

Calculate binary similarity in time

Calculate multiple plot resemblance measures

Little helper function to obtain bubble plots with simple plot and points methods

Compare mean similarity between subsets of data

Convert dist-objects and matrices to database format

Calculate the difference in Mean between two vectors

Permuted Correlation (on strata)

Calculate permuted (Mantel) correlations between one and many variables

Calculate the difference in slope or intercept of two regression lines

Artificial data-set for studying the mathematical behavior of asymmetric similarity coefficients

Calculate Bray-Curtis distance for only one variable

Internal functions of the package simba that are usually not called (or only implicitly) by the user

Vegetation and environmental data recorded in a Tundra ecosystem in Northern Sweden (Southeast of Abisko).