dfr slice for dataframe> dfr slice {flags} (offset) (size)
offset: start of slicesize: size of slice| input | output | 
|---|---|
| any | any | 
Create new dataframe from a slice of the rows
> [[ab]; [12] [34]] |dfr into-df|dfr slice01
╭───┬───┬───╮
│# │ a │ b │
├───┼───┼───┤
│0│1│2│
╰───┴───┴───╯
Tips: Dataframe commands were not shipped in the official binaries by default, you have to build it with --features=dataframe flag
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    https://www.nushell.sh/commands/docs/dfr_slice.html