All pairwise column name combinations

Generates a data frame of all pairwise combinations of column names from a data frame. Useful for programmatically specifying variable pairs to pass to functions like compute_crosstable or plot_crosstable.

Usage

comparison_combinations(df, all_orders = TRUE)

Arguments

df

A data frame whose column names will be combined.

all_orders

Logical. When TRUE (default) both orderings of each pair are included (e.g. (X1, X2) and (X2, X1)), producing \(n(n-1)\) rows for \(n\) columns. When FALSE only unique unordered pairs are returned, producing \(n(n-1)/2\) rows.

Value

A data frame with two character columns X1 and X2, each row representing one variable pair.

Examples

comparison_combinations(generate_correlation_matrix(n = 10)[, 1:4])
#>    X1 X2
#> 1  X1 X2
#> 2  X1 X3
#> 3  X1 X4
#> 7  X2 X1
#> 4  X2 X3
#> 5  X2 X4
#> 8  X3 X1
#> 10 X3 X2
#> 6  X3 X4
#> 9  X4 X1
#> 11 X4 X2
#> 12 X4 X3