Tabulate column attributes
Examples
library(data.table)
x <- data.table(
id = 1:5,
sbp = rnorm(5, 120, 15),
dbp = rnorm(5, 80, 10),
paO2 = rnorm(5, 90, 10),
paCO2 = rnorm(5, 40, 5)
)
setattr(x[["sbp"]], "source", "outpatient")
setattr(x[["dbp"]], "source", "outpatient")
setattr(x[["paO2"]], "source", "icu")
setattr(x[["paCO2"]], "source", "icu")
table_column_attr(x, "source")
#> attrs
#> icu outpatient <NA>
#> 2 2 1