divc

a data frame with elements as rows, samples as columns,
 and abundance, presence-absence or frequencies as entries

an object of class <code>dist</code> containing distances or dissimilarities among elements.
 If <code>dis</code> is NULL, Gini-Simpson index is performed.

a logical value indicating whether or not the diversity coefficient
 should be scaled by its maximal value over all frequency distributions.

scale

Calculates Rao's diversity coefficient within samples.

multivariate

Tools for multivariate data analysis. Several methods are provided for the analysis (i.e., ordination) of one-table (e.g., principal component analysis, correspondence analysis), two-table (e.g., coinertia analysis, redundancy analysis), three-table (e.g., RLQ analysis) and K-table (e.g., STATIS, multiple coinertia analysis). The philosophy of the package is described in Dray and Dufour (2007) <doi:10.18637/jss.v022.i04>.

Aurélie Siberchicot

ade4

Analysis of Ecological Data: Exploratory and Euclidean Methods
in Environmental Sciences

divc function

<dl> <dt>df</dt>
<dd>a data frame with elements as rows, samples as columns,
 and abundance, presence-absence or frequencies as entries</dd> <dt>dis</dt>
<dd>an object of class <code>dist</code> containing distances or dissimilarities among elements.
 If <code>dis</code> is NULL, Gini-Simpson index is performed.</dd> <dt>scale</dt>
<dd>a logical value indicating whether or not the diversity coefficient
 should be scaled by its maximal value over all frequency distributions.</dd></dl>

Arguments

Sandrine Pavoine <a href="/link/pavoine%40mnhn.fr?package=ade4&version=1.7-19" data-mini-rdoc="ade4::pavoine@mnhn.fr">pavoine@mnhn.fr</a>

Author

Rao's diversity coefficient also called quadratic entropy — divc

<dl>

 <dt>df</dt>
<dd>a data frame with elements as rows, samples as columns,
 and abundance, presence-absence or frequencies as entries</dd>

 <dt>dis</dt>
<dd>an object of class <code>dist</code> containing distances or dissimilarities among elements.
 If <code>dis</code> is NULL, Gini-Simpson index is performed.</dd>

 <dt>scale</dt>
<dd>a logical value indicating whether or not the diversity coefficient
 should be scaled by its maximal value over all frequency distributions.</dd>

</dl>

Sandrine Pavoine <a href='mailto:pavoine@mnhn.fr'>pavoine@mnhn.fr</a>

divc: Rao's diversity coefficient also called quadratic entropy

Description

Usage

Value

Arguments

Author

References

Examples