as.matrix: Coerce to a Matrix

In nexus: Sourcing Archaeological Materials by Chemical Composition

Coerce to a Matrix

Description

Coerce to a Matrix

Usage

## S4 method for signature 'NumericMatrix'
as.matrix(x, ...)

Arguments

x	An R object (typically, a CompositionMatrix object).
...	Currently not used.

Value

A matrix.

Note

June 2026: aperm.default() now copy attributes, this change how apply() works on classed objects. The simplest "fix" is to add an aperm() S3 method for the class which drops attributes as aperm.default() previously did. Alternatively, one could also consider providing as.matrix()/as.array() methods which change to standard matrix/array.

Author(s)

N. Frerebeau

Examples

## Create a count matrix
A1 <- matrix(data = sample(100, 100, TRUE), nrow = 20)

## Coerce to compositions
B <- as_composition(A1)

## Row sums are internally stored before coercing to relative frequencies
totals(B)

## This allows to restore the source data
A2 <- as_amounts(B)

## Coerce to a data.frame
X <- as.data.frame(B)
head(X)

nexus documentation built on June 23, 2026, 9:06 a.m.