Get Aliases of column names
Retrieves attributes label and units of class labelled and attribute alias otherwise.
get_alias(x, ...) ## S3 method for class 'labelled' get_alias(x, ...) ## Default S3 method: get_alias(x, ...) ## S3 method for class 'data.frame' get_alias(x, ...) ## S3 method for class 'list' get_alias(x, ...)
x |
An object. Aliases will be retrieved of |
... |
Passed from and to other methods. |
We use attributes here, to assign alternative names to columns.
Also class labelled created by Hmisc's label is supported.
This is a workhorse function, see create_alias_mapping for the high level function
For atomic vectors a character of NULL; for non-atomic vectors the results of get_alias applied to its elements.
labelled: Retrieve attributes label and units, if available.
Units are bracketed by '[]'. See also label and units.
The user may alter this method via atable_options, see help there.
default: Retrieve attribute alias via attr.
This attribute may be an arbitrary character.
If there is no attribute alias, then get_alias.default returns NULL.
data.frame: Calls get_alias on every column.
list: Calls get_alias on every element of the list.
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