
Subsets unit_string, retaining class.
# S3 method for unit_string
[(x, ...)
unit_string
unit_string
passed to next method
Other unit_string:
[[.unit_string()
,
as_unit_string()
,
as_unit_string.character()
,
as_unit_string.factor()
,
as_unit_string.symbolic_units()
,
as_unit_string.units()
x <- c(
'm',
's',
'ng/mL'
)
x <- as_unit_string(x)
class(x)
class(x[1])
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