key_colnames | R Documentation |
Grab any keys associated to an epi_df
key_colnames(x, ...)
## Default S3 method:
key_colnames(x, ...)
## S3 method for class 'data.frame'
key_colnames(x, other_keys = character(0L), exclude = character(0L), ...)
## S3 method for class 'epi_df'
key_colnames(x, exclude = character(0L), ...)
## S3 method for class 'epi_archive'
key_colnames(x, exclude = character(0L), ...)
x |
a data.frame, tibble, or epi_df |
... |
additional arguments passed on to methods |
other_keys |
an optional character vector of other keys to include |
exclude |
an optional character vector of keys to exclude |
If an epi_df
, this returns all "keys". Otherwise NULL
.
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