roybens/MEA_Analysis

Preprocessing: SpikeInterface local CMR local_radius=(250,250) likely empty annulus; falls back to global

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#125 opened on Feb 2, 2026

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buggood first issue

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Description

Summary

Local common median reference (CMR) in preprocessing seems like it should fail local_radius=(250, 250), causing fallback to global CMR every time. Not sure if this is the intent, or if I'm misunderstanding the code. I also wrote a note near the offending code for greater context (in aw_dev branch)

Impact

  • Potentially changes preprocessing behavior and downstream burst/network metrics.
  • Might be happening on most/ all runs (needs confirmation).

Where

MEA_Analysis/IPNAnalysis/mea_analysis_routine.py in run_preprocessing():

rec = spre.common_reference(rec, reference='local', operator='median', local_radius=(250, 250))

Expected behavior

  • Warning logged: Local CMR failed (missing locations?), using Global CMR.

Contributor guide

Research direction
Inspect the local radius parameter in the common reference call to determine why it leads to an empty annulus, causing fallback to global CMR.
Tech stack
python
Domain
data
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
PythonGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75