Create a list of possible pairwise comparisons between groups. If a reference group is specified, only comparisons against reference will be kept.

get_comparisons(data, variable, ref.group = NULL)

## Arguments

data a data frame the grouping variable name. Can be unquoted. a character string specifying the reference group. Can be unquoted. If numeric, then it should be quoted. If specified, for a given grouping variable, each of the group levels will be compared to the reference group (i.e. control group). If ref.group = "all", pairwise comparisons are performed between each grouping variable levels against all (i.e. basemean).

## Value

a list of all possible pairwise comparisons.

## Examples

# All possible pairwise comparisons
ToothGrowth %>%
get_comparisons("dose")#> $V1 #> [1] "0.5" "1" #> #>$V2
#> [1] "0.5" "2"
#>
#> $V3 #> [1] "1" "2" #> # Comparisons against reference groups ToothGrowth %>% get_comparisons("dose", ref.group = "0.5")#>$V1
#> [1] "0.5" "1"
#>
#> $V2 #> [1] "0.5" "2" #> # Comparisons against all (basemean) ToothGrowth %>% get_comparisons("dose", ref.group = "all")#>$V1
#> [1] "all" "0.5"
#>
#> $V2 #> [1] "all" "1" #> #>$V3
#> [1] "all" "2"
#>