22 July 2013

Present: Lee, Tom (scribe), Kyle, Jake, Kwaku (hangouts)

Next lab meetings: 7/30/13 and 8/7/13.

Reading: Lee will send around a paper to read for the 8/7/13 meeting.

Lexicase

  • Lee’s improvements:
    • Idea: what’s important is case sequences, not cases by themselves.
    • “Condensed” lexicase: Find all of the sets of elites that can be reached through lexicase, and then select one at random and a random individual from that set.
  • Paper
    • Rough draft by end of week
    • Ignore population size / test case stuff for now.
  • Homologous selection and lexicase together?

Brevis

Speedups are in the works.

Visualization

  • Stack traces are looking great!
  • Tom will send Jake some stack traces of big (maybe real) programs.

GECCCO Report

  • Jeff Clune – discussed connection costs in programs
  • Kris Krawiec – GSXover discussion
  • Stack-based workshop was small but some interesting ideas
  • Leonardo Trujillo – discussion about novelty search to refine fitness function.
    • includes program modality
    • combines advantages of novelty search and guided by error search.

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