* 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 commit aa45a591fe.
* Revert "stats1: add rank accumulator (#383)"
This reverts commit 96deed048a.
* 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>
Logic for transforming input records into output records as requested by the user (sort, filter, etc.).:
The IRecordTransformer abstract record-transformer interface datatype, as well as the ChainTransformer Go-channel chaining mechanism for piping one transformer into the next.
The transformer lookup table, used for Miller command-line parsing, verb construction, and online help.
All the concrete record-transformers such as cat, tac, sort, put, and so on.
f9afae491f