Utterance Range Filtering

Status: Current Range filters restrict analysis to a numbered subset of utterances, useful for analyzing specific portions of a transcript without splitting the file.

Usage

chatter clan freq --range 10-50 file.cha
chatter clan mlu --range 1-100 file.cha

CLAN equivalent: +z10-50

Behavior

• Utterance numbering starts at 1
• Both endpoints are inclusive (e.g., --range 10-50 includes utterances 10, 11, …, 50)
• Only main-tier utterances (*SPK: lines) are counted; headers, dependent tiers, and comments are not numbered
• Range filtering is applied after speaker filtering — if you filter to --speaker CHI, utterance 1 is the first CHI utterance, not the first utterance in the file

Open-ended ranges

To analyze from a point to the end of the file, use a large upper bound:

chatter clan freq --range 50-9999 file.cha

Combining with other filters

Range composites with all other filters:

# First 50 CHI utterances within a gem segment
chatter clan mlu --speaker CHI --range 1-50 --gem "story" file.cha