Extract variable labels from labelled data frame — extract

Extract variable labels from data and return a data frame with labels

extract_labels(data, sep = "_")

Arguments

data: the data frame to extract labels from
sep: character used to separate multiple labels, defaults to "_"

Details

All variable names will be returned, even those with no labels. If the label attribute has length greater than one the values will be concatenated and returned as a single string separated by sep

Examples

# Set a few variable labels for ctDNA
data("ctDNA")
ctDNA <- ctDNA |> set_var_labels(
   ctdna_status="detectable ctDNA",
  cohort="A cohort label")
# Extract labels
extract_labels(ctDNA)
#>       variable                                   label
#> 1           id                              Patient ID
#> 2       cohort                          A cohort label
#> 3 ctdna_status                        detectable ctDNA
#> 4         time            Number of weeks on treatment
#> 5  size_change Percentage change in tumour measurement