mirror of
https://github.com/johnkerl/miller.git
synced 2026-07-17 16:38:54 +00:00
f9afae491f
* stats1: add rank accumulator (#383) Adds `mlr stats1 -a rank` for standard competition ranking (1,2,2,4,...) on pre-sorted data, most useful with -s for a rank on every record. * stats1: make rank order-independent by default, add --rank-sorted opt-in fast path The rank accumulator previously only compared each value to the immediately preceding record, silently giving wrong ranks for non-adjacent duplicates (e.g. unsorted input, or interleaved -g groups). Default to correctly computing standard competition rank from all values seen so far (order-independent, buffers values, same approach as percentile accumulators). Add --rank-sorted for callers who can promise sorted input and want the previous O(1)-space streaming behavior instead. * Revert "stats1: make rank order-independent by default, add --rank-sorted opt-in fast path" This reverts commitaa45a591fe. * Revert "stats1: add rank accumulator (#383)" This reverts commit96deed048a. * Add mlr rank verb (#383) Reverts the earlier stats1 -a rank / --rank-sorted approach: stats1 is a reduce verb (many records -> one summary record per group) and rank is a per-record annotator, so it never fit cleanly there -- it needed stats1's -s iterative-stats escape hatch just to be useful, plus a bolted-on sorted/unsorted split. mlr rank is a dedicated verb modeled on mlr fraction: -f fields to rank, -g optional group-by, output field <f>_rank. By default it's a two-pass algorithm (buffers input, like fraction does) giving standard competition rank (1,2,2,4,...) that's correct regardless of input order. --sorted opts into a single-pass, O(1)-space streaming alternative for callers who can promise pre-sorted input (e.g. via 'mlr sort' first). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * Regenerate docs/man pages after merging main (sparkline verb) --------- Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
14 B
14 B
| 1 | x |
|---|---|
| 2 | 20 |
| 3 | 10 |
| 4 | 20 |
| 5 | 30 |