Subset an obr_tbl, preserving provenance

Standard data.frame subsetting drops the obr_tbl class. This method preserves it (and the provenance attributes) when the result is still a data.frame.

Usage

# S3 method for class 'obr_tbl'
x[...]

Arguments

x

An obr_tbl.

...

Subsetting arguments passed to [[.data.frame].

Value

An obr_tbl if the subset is two-dimensional, otherwise the underlying vector.