ReferenceGroups-class: Grouped Data

In nexus: Sourcing Archaeological Materials by Chemical Composition

Grouped Data

Description

A virtual S4 class to represent reference groups.

Usage

is_grouped(object)

Arguments

object

A ReferenceGroups object.

Slots

group_indices

An integer vector to store the group that each value belongs to.

group_levels

A character vector to store the values of the grouping variables.

Author(s)

N. Frerebeau

See Also

Other classes: CompositionMatrix-class, GroupedComposition-class, GroupedLogRatio-class, LogRatio-class, NumericMatrix-class, OutlierIndex-class

Examples

## Data from Aitchison 1986
data("hongite")

## Coerce to compositional data
coda <- as_composition(hongite)

## codaccess
dim(coda) # Get the matrix dimensions
row(coda) # Get the row indexes
col(coda, as.factor = TRUE) # Get the column indexes
nrow(coda) # Get the number of rows
ncol(coda) # Get the number of columns
dimnames(coda) # Get the dimension names
rownames(coda) <- LETTERS[1:25] # Set the row names
rownames(coda) # Get the rownames
colnames(coda) <- letters[21:25] # Set the column names
colnames(coda) # Get the column names

nexus documentation built on April 4, 2025, 1:12 a.m.