Coerce to a Matrix

Usage

# S4 method for class '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

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)
#>  [1] 245 264 258 162 253 285 223 369 255 279 190 246 344 381  84 231 240 356 195
#> [20] 145

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

## Coerce to a data.frame
X <- as.data.frame(B)
head(X)
#>            V1        V2         V3         V4        V5
#> S1 0.13469388 0.1673469 0.15918367 0.33877551 0.2000000
#> S2 0.13636364 0.3106061 0.04166667 0.21212121 0.2992424
#> S3 0.02713178 0.3643411 0.16279070 0.20155039 0.2441860
#> S4 0.14197531 0.1172840 0.24691358 0.35185185 0.1419753
#> S5 0.34782609 0.3003953 0.05928854 0.06719368 0.2252964
#> S6 0.11929825 0.1789474 0.28771930 0.30526316 0.1087719