[Eeglablist] Startle Processing Script Error

[Ken Bennett]

Steve,

Thank you very much for your input and all of the helpful information! I
will check to see which format my triggers are in. I think that some of my
epochs may have more than one trigger, so I will look further into
resolving this issue. I will let you know if I cannot work around the error
and request a sample of your code. I appreciate it.

Thanks!
Ken


--

Kenneth Bennett
Second Year Clinical Graduate Student
Affective Neuroscience Laboratory
Department of Psychology
University of Wisconsin-Milwaukee
334 Garland Hall


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On Tue, Feb 9, 2016 at 1:48 AM, Stephen Politzer-Ahles <
stephen.politzer-ahles at ling-phil.ox.ac.uk> wrote:

> Hi Ken,
>
> This is not an EEGLAB-related error, this is an error in your code. As the
> error messages explain, the str2num() function requires its input to be a
> string (it converts a string to a numeric format, for example, str2num( '2'
> ) returns the integer 2 rather than the string '2'). But EEG.event.type in
> your dataset is apparently not in string format. Probably what happened is
> that whoever wrote the script wrote it with the assumption that
> EEG.event.type was always a string (e.g. a trigger number coded as a
> string, like '1', '2', etc.; some EEG acquisition systems record the
> triggers in this way), but yours is in another format. Maybe it's already
> in integer format; more likely, you have some epochs which include more
> than one trigger. For instance, if epoch 1 happens to have three triggers
> in it, then EEG.event(1).type might be e.g. {'1' '2' '3'}; str2num() cannot
> take this value as input.
>
> For what it's worth, I use a similar approach in my code (also using
> arrayfun() to pull out the triggers from the EEG.event structure); if you
> are not able to work around this error, let me know and I can send a sample
> of my code, which has had to handle the exact same kind of situation I
> described above (multiple events within a single epoch).
>
> Best,
> Steve
>
>
>
> ---
> Stephen Politzer-Ahles
> University of Oxford
> Language and Brain Lab
> Faculty of Linguistics, Phonetics & Philology
> http://users.ox.ac.uk/~cpgl0080/
>
> On Mon, Feb 8, 2016 at 11:19 PM, Ken Bennett <benne257 at uwm.edu> wrote:
>
>> Hello all,
>>
>> I am having some difficulties running startle EMG data through a shared
>> matlab script. The script runs a high pass filter, rectify, low pass,
>> epoch/baseline correct, artifact rejection, and peak score. Whenever I run
>> it, I receive an error that says:
>>
>> Error using str2num (line 33)
>>
>> Requires string or character array input.
>>
>>
>> Error in @(x)(str2num(EEG.event(x).type))
>>
>>
>> Error in EEGLAB_StartleReduction (line 34)
>>
>>             triggers = arrayfun( @(x)(str2num(EEG.event(x).type)),
>> 1:length(EEG.event) )’;
>>
>>
>> I tried troubleshooting the error with a colleague who also uses this
>> script, but we could not fix it. Is anyone familiar with this script and/or
>> this error?
>>
>> Here is a link to the .set file and script file
>> (EEGLAB_StartleReduction.m): http://1drv.ms/1KBCFPA
>>
>> Please let me know if you have any questions or comments.
>>
>> Thanks!
>> Ken
>>
>> --
>>
>> Kenneth Bennett
>> Second Year Clinical Graduate Student
>> Affective Neuroscience Laboratory
>> Department of Psychology
>> University of Wisconsin-Milwaukee
>> 334 Garland Hall
>>
>>
>> *CONFIDENTIALITY NOTICE: *This e-mail message, including any
>> attachments, is for the sole use of the intended recipient(s) and may
>> contain confidential or proprietary information which is legally
>> privileged. Any unauthorized review, use, disclosure, or distribution is
>> prohibited. If you are not the intended recipient, please promptly contact
>> the sender by reply e-mail and delete the message.
>>
>>
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>
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