# Equalize Event Counts Error

**URL:** <https://mne.discourse.group/t/equalize-event-counts-error/1246>\
**Category:** Mailing List Archive (read-only)\
**Tags:** list-archive\
**Created:** [June 22, 2017, 6:19pm UTC](https://mne.discourse.group/t/equalize-event-counts-error/1246 "2017-06-22T18:19:18Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\
**Post date:** [June 22, 2017, 6:19pm UTC](https://mne.discourse.group/t/equalize-event-counts-error/1246/1 "2017-06-22T18:19:18Z")

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Hi,

Whenever I try to use the epochs.equalize\_event\_counts, I get this same error:

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\
**Post date:** [June 22, 2017, 9:47pm UTC](https://mne.discourse.group/t/equalize-event-counts-error/1246/2 "2017-06-22T21:47:21Z")

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Hi,

Can you share a code to replicate this on the sample data?

thanks  
Alex

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\
**Post date:** [June 22, 2017, 10:14pm UTC](https://mne.discourse.group/t/equalize-event-counts-error/1246/3 "2017-06-22T22:14:42Z")

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Hey Alex,

The attached bit of code causes the error on the sample data for me.

Cheers,  
Cody

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\
**Post date:** [June 23, 2017, 6:12am UTC](https://mne.discourse.group/t/equalize-event-counts-error/1246/4 "2017-06-23T06:12:38Z")

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Hi,

equalize\_event\_counts takes a list of indices. So you should do  
epochs.equalize\_event\_counts(['1',  
'2']) instead.

-Jaakko

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\
**Post date:** [June 23, 2017, 12:57pm UTC](https://mne.discourse.group/t/equalize-event-counts-error/1246/5 "2017-06-23T12:57:59Z")

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Aha, that did it. Thanks Jaako! I also just realized I had been looking at documentation for equalize\_epochs\_counts, but using equalize\_event\_counts in my code. So, that was my bad from the start.

Cheers,  
Cody