[Mne_analysis] epochs with no data?

[Denis A. Engemann]

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Hum. That sounds puzzling. Can you reproduce this somehow with the MNE sample data? That could help to see if there is something wrong in the code or if something is special about your data.

Best,
Denis

> On 4 Jan 2019, at 22:24, Dillan Cellier <cellierdillan at gmail.com> wrote:
> 
>         External Email - Use Caution        
> 
> Hi Denis,
> 
> The events are 2 seconds apart from each other.
> 
> Thanks!
> 
> Dillan
> 
>> On Fri, Jan 4, 2019 at 3:18 PM Denis A. Engemann <denis-alexander.engemann at inria.fr> wrote:
>>         External Email - Use Caution        
>> 
>> Hi Dillan,
>> 
>> What is then the distance in seconds between any two events that you passed to the epochs constructor?
>> 
>> Denis
>> 
>>> On 4 Jan 2019, at 22:12, Dillan Cellier <cellierdillan at gmail.com> wrote:
>>> 
>>>         External Email - Use Caution        
>>> 
>>> Hi Denis,
>>> 
>>> I limited the tmin and tmax of the epoch to 0 and 2, respectively, since I don't any kind of stimulus onset in these epochs and don't want them to overlap. This is partly what puzzles me, as I would think this would prevent any inclusion of not-real data. My resting state data can be cut into 93 two-second time windows, and this the number of events I am feeding into the epoch object. It is labeling 41 of these 93 as 'NO_DATA'. 
>>> 
>>> Thank you very much!
>>> 
>>> Dillan
>>> 
>>>> On Fri, Jan 4, 2019 at 3:05 PM Denis A. Engemann <denis-alexander.engemann at inria.fr> wrote:
>>>>         External Email - Use Caution        
>>>> 
>>>> Hi Dillan,
>>>> 
>>>> This can happen when the epochs selected include (theoretical) samples beyond the (actual) data range. You should not have many of those epochs. Can you roughly tell how many no_data labels you found? I‘d need to refresh my knowledge of the epochs reading code a bit to see if there may be other reasons for this. Let‘s see what the others say in the meantime.
>>>> 
>>>> Best,
>>>> Denis
>>>> 
>>>>> On 4 Jan 2019, at 21:56, Dillan Cellier <cellierdillan at gmail.com> wrote:
>>>>> 
>>>>>         External Email - Use Caution        
>>>>> 
>>>>> Hello again!
>>>>> 
>>>>> Thank you for your responses on my last question, they were very helpful. I am running into another problem now, however. I am epoching resting state data into arbitrary 2 second windows. I am not automatically rejecting epochs by annotation nor by a rejection parameter. I see that the epoch object's drop_log is recording nearly the whole first half of the epochs as "NO_DATA" epochs, however the raw file contains data for those time indices. I am unsure what could be going on to result in this loss of data, however it seems especially problematic due to the amount of epochs dropped. Thank you in advance, again!
>>>>> 
>>>>> Best wishes,
>>>>> Dillan
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