dfr sample for dataframe

Create sample dataframe.

Signature

> dfr sample

Examples

Sample rows from dataframe

> [[a b]; [1 2] [3 4]] | dfr into-df | dfr sample -n 1

Shows sample row using fraction and replace

> [[a b]; [1 2] [3 4] [5 6]] | dfr into-df | dfr sample -f 0.5 -e