Simple Correspondence Analysis — mv

Builds a contingency table from two columns of a data frame and runs simple correspondence analysis (MASS::corresp), returning row and column coordinates and the inertia decomposition.

Usage

mv_corresp(data, row, col, nf = 2)

Arguments

data: A data frame.
row: <tidy-select> The single row-factor column.
col: <tidy-select> The single column-factor column.
nf: Number of dimensions to compute; must be smaller than both the number of rows and the number of columns of the table.

Value

An object of class mv_corresp: a list with components row_coord (tibble with row and Dim1...), col_coord (tibble with col and Dim1...), inertia (tibble with dimension, inertia, prop, cum), and meta.

Examples

set.seed(42)
df = data.frame(
  breed = rep(c("A", "B", "C"), each = 30),
  grade = sample(c("low", "mid", "high"), 90, TRUE)
)
r = mv_corresp(df, breed, grade)
r$inertia
#> # A tibble: 2 × 4
#>   dimension  inertia     prop   cum
#>       <int>    <dbl>    <dbl> <dbl>
#> 1         1 3.97e- 2 1   e+ 0     1
#> 2         2 3.41e-32 8.59e-31     1