[Eeglablist] Can you direct me to a download for the .elp coordinates for the EGI 129-channel hydrocell net?

Wed Feb 19 15:19:33 PST 2025

It would be great if someone could send me a link for a download of the .elp coordinates for the EGI 129-channel hydrocell net.
Thanks. It appears that these coordinates are needed to use the RELAX preprocessing program.
David Gilbert

________________________________
From: eeglablist <eeglablist-bounces at sccn.ucsd.edu> on behalf of Scott Makeig via eeglablist <eeglablist at sccn.ucsd.edu>
Sent: Tuesday, February 11, 2025 6:43 PM
To: Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
Cc: eeglablist at sccn.ucsd.edu <eeglablist at sccn.ucsd.edu>
Subject: Re: [Eeglablist] Consequences of manual rejection on continuous data

[EXTERNAL EMAIL ALERT]: Verify sender before opening links or attachments.

oh... the *EEG.event* field also contains index pointers mapping the
(remaining) events to their original event markers in *EEG.urevent*.  This
allows you to use EEG.urevent information in analysis of events in the
EEG.event structure. The function EEG_context helps do this, as discussed
here <https://urldefense.com/v3/__https://nam11.safelinks.protection.outlook.com/?url=https*3A*2F*2Furldefense.com*2Fv3*2F__https*3A*2F*2Feeglab.org*2Ftutorials*2FConceptsGuide*2FData_Structures.html__*3B!!Mih3wA!D9DewwxkVOrP8-ew_2ZbSe7CPIY-6Z6JmwcZY4Q-LLc2HAOEkvYQeLI676zgkOnYREuv4mR0Flg7l8_yjxsz*24&data=05*7C02*7Cdgilbert*40siu.edu*7Cec4886b1f70b4ba9204108dd4b0741c8*7Cd57a98e7744d43f9bc9108de1ff3710d*7C0*7C0*7C638749216745314269*7CUnknown*7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ*3D*3D*7C0*7C*7C*7C&sdata=0tOKsj1YVS11niAEH1Etamn8oAdqN84iVBX8Jq4jV40*3D&reserved=0__;JSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUl!!Mih3wA!DPB1e-FJWbMFVPUjtO311vKpiN8_MRIQAWUsTZK5-2UkmOfiHnFuuSWsBWEX86SVF6HBcX5iior_QKwb7PGo8Z8$  >.

On Tue, Feb 11, 2025 at 7:32 PM Scott Makeig <smakeig at gmail.com> wrote:

> Also, Alexis -
>
> The *EEG.urevent* field contains the marked times and types of ALL the
> original dataset event markers, in case your analysis needs to use this
> info to inform analysis of the remaining 'good' data after data rejection.
>
> Scott
>
> On Tue, Feb 11, 2025 at 4:26 PM Makoto Miyakoshi via eeglablist <
> eeglablist at sccn.ucsd.edu> wrote:
>
>> Hi Alexis,
>>
>> For the effect of spurious time-frequency modulations by the 'boundaries'
>> (i.e. time-domain data splicing), see this lecture from this time window.
>>
>> https://urldefense.com/v3/__https://nam11.safelinks.protection.outlook.com/?url=https*3A*2F*2Furldefense.com*2Fv3*2F__https*3A*2F*2Fyoutu.be*2FNHKIPU_T7-0*3Ft*3D1861__*3B!!Mih3wA!BvbL3M2FKPfr96zDK2dQozcuEb3JkI1D0L68Em1CBkp9fdEZQmMUs2hdY1aatbXEZd9JhVC7dsPXleIwBuZ5zduV4as*24&data=05*7C02*7Cdgilbert*40siu.edu*7Cec4886b1f70b4ba9204108dd4b0741c8*7Cd57a98e7744d43f9bc9108de1ff3710d*7C0*7C0*7C638749216745336756*7CUnknown*7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ*3D*3D*7C0*7C*7C*7C&sdata=CQBVgIZRTEdKTC9pn2lN4F7b15NxrTb2FyJ7xgqy5HU*3D&reserved=0__;JSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUl!!Mih3wA!DPB1e-FJWbMFVPUjtO311vKpiN8_MRIQAWUsTZK5-2UkmOfiHnFuuSWsBWEX86SVF6HBcX5iior_QKwbKyZcdAw$ <https://urldefense.com/v3/__https://youtu.be/NHKIPU_T7-0?t=1861__;!!Mih3wA!BvbL3M2FKPfr96zDK2dQozcuEb3JkI1D0L68Em1CBkp9fdEZQmMUs2hdY1aatbXEZd9JhVC7dsPXleIwBuZ5zduV4as$>
>>
>> That said, at least within EEGLAB, 'boundary' event markers are treated
>> with special care by filter functions so that sub-windows containing the
>> 'boundary' are excluded from the process.
>> So, spurious artifacts in the frequency domain should not appear.
>>
>> However, when you export your data to other applications without the
>> 'boundary' event markers, you may experience troubles when applying
>> frequency filters (thanks Masataka for pointing this out!)
>>
>> Makoto
>>
>> On Tue, Feb 4, 2025 at 12:47 PM Alexis Leiva via eeglablist <
>> eeglablist at sccn.ucsd.edu> wrote:
>>
>> > Dear all,
>> >
>> >  I am performing an experiment with 4-minute blocks to analyze the power
>> > spectrum from the entire block but not in epochs. Then, when I manually
>> > reject a noisy segment from the continuous data in EEGLAB, a boundary
>> mark
>> > event appears in the channel data.
>> >
>> > Now, my question: Is this method of rejection and the boundary mark
>> > apparition in EEGLAB a “cut and splice” implementation, inserting a
>> kind of
>> > imbalance into the signal after splicing the pre- and post-noise
>> segments?
>> > Knowing the possible consequences of manual rejection of my continuous
>> data
>> > is critical because I don’t know if this implementation might cause a
>> > non-evident discontinuity of my data, some distortion, unreliable
>> outcomes,
>> > or another kind of issue on the power spectrum calculus through Welch’s
>> > method on the entire blocks.
>> >
>> > I appreciate your help.
>> >
>> > Regards,
>> >
>> > Alexis
>> >
>> > --
>> >  Alexis Leiva Catalán
>> > Tecnólogo Médico  mención en ORL Universidad de Chile.
>> >  Candidato a PhD Neurociencias Pontificia Universidad Católica De Chile.
>> > _______________________________________________
>> > To unsubscribe, send an empty email to
>> > eeglablist-unsubscribe at sccn.ucsd.edu or visit
>> > https://urldefense.com/v3/__https://nam11.safelinks.protection.outlook.com/?url=https*3A*2F*2Fsccn.ucsd.edu*2Fmailman*2Flistinfo*2Feeglablist&data=05*7C02*7Cdgilbert*40siu.edu*7Cec4886b1f70b4ba9204108dd4b0741c8*7Cd57a98e7744d43f9bc9108de1ff3710d*7C0*7C0*7C638749216745349581*7CUnknown*7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ*3D*3D*7C0*7C*7C*7C&sdata=gqBzA5u5scb49erg*2BrpkyRUYTdGOQeb15rF5TPHEgVc*3D&reserved=0__;JSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUl!!Mih3wA!DPB1e-FJWbMFVPUjtO311vKpiN8_MRIQAWUsTZK5-2UkmOfiHnFuuSWsBWEX86SVF6HBcX5iior_QKwbUupb-Y8$ <https://sccn.ucsd.edu/mailman/listinfo/eeglablist>.
>> _______________________________________________
>> To unsubscribe, send an empty email to
>> eeglablist-unsubscribe at sccn.ucsd.edu or visit
>> https://urldefense.com/v3/__https://nam11.safelinks.protection.outlook.com/?url=https*3A*2F*2Fsccn.ucsd.edu*2Fmailman*2Flistinfo*2Feeglablist&data=05*7C02*7Cdgilbert*40siu.edu*7Cec4886b1f70b4ba9204108dd4b0741c8*7Cd57a98e7744d43f9bc9108de1ff3710d*7C0*7C0*7C638749216745361886*7CUnknown*7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ*3D*3D*7C0*7C*7C*7C&sdata=LBqcyFx8OMdnbT9wL6HiOwgu2yun*2BKiC5g1D1Vi7HD4*3D&reserved=0__;JSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUl!!Mih3wA!DPB1e-FJWbMFVPUjtO311vKpiN8_MRIQAWUsTZK5-2UkmOfiHnFuuSWsBWEX86SVF6HBcX5iior_QKwbfUIZIEQ$ <https://sccn.ucsd.edu/mailman/listinfo/eeglablist>.
>
>
>
> --
> Scott Makeig, Research Scientist and Director, Swartz Center for
> Computational Neuroscience, Institute for Neural Computation, University of
> California San Diego, La Jolla CA 92093-0559, https://urldefense.com/v3/__https://nam11.safelinks.protection.outlook.com/?url=http*3A*2F*2Fsccn.ucsd.edu*2F*scott&data=05*7C02*7Cdgilbert*40siu.edu*7Cec4886b1f70b4ba9204108dd4b0741c8*7Cd57a98e7744d43f9bc9108de1ff3710d*7C0*7C0*7C638749216745373889*7CUnknown*7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ*3D*3D*7C0*7C*7C*7C&sdata=5d*2FHy50OlVpheAedqtqqmem1SgGiqHPhJMb*2FiiuN1Vk*3D&reserved=0__;JSUlJX4lJSUlJSUlJSUlJSUlJSUlJSUl!!Mih3wA!DPB1e-FJWbMFVPUjtO311vKpiN8_MRIQAWUsTZK5-2UkmOfiHnFuuSWsBWEX86SVF6HBcX5iior_QKwbH8o01Dg$ <http://sccn.ucsd.edu/~scott>
>

--
Scott Makeig, Research Scientist and Director, Swartz Center for
Computational Neuroscience, Institute for Neural Computation, University of
California San Diego, La Jolla CA 92093-0559, https://urldefense.com/v3/__https://nam11.safelinks.protection.outlook.com/?url=http*3A*2F*2Fsccn.ucsd.edu*2F*scott&data=05*7C02*7Cdgilbert*40siu.edu*7Cec4886b1f70b4ba9204108dd4b0741c8*7Cd57a98e7744d43f9bc9108de1ff3710d*7C0*7C0*7C638749216745385983*7CUnknown*7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ*3D*3D*7C0*7C*7C*7C&sdata=RNN5*2BOCbzqRWpYGzVBpys1UGt*2BSbh*2FHGLDwHNrtmvWc*3D&reserved=0__;JSUlJX4lJSUlJSUlJSUlJSUlJSUlJSUlJQ!!Mih3wA!DPB1e-FJWbMFVPUjtO311vKpiN8_MRIQAWUsTZK5-2UkmOfiHnFuuSWsBWEX86SVF6HBcX5iior_QKwbPpqKHuQ$ <http://sccn.ucsd.edu/~scott>
_______________________________________________
To unsubscribe, send an empty email to eeglablist-unsubscribe at sccn.ucsd.edu or visit https://urldefense.com/v3/__https://nam11.safelinks.protection.outlook.com/?url=https*3A*2F*2Fsccn.ucsd.edu*2Fmailman*2Flistinfo*2Feeglablist&data=05*7C02*7Cdgilbert*40siu.edu*7Cec4886b1f70b4ba9204108dd4b0741c8*7Cd57a98e7744d43f9bc9108de1ff3710d*7C0*7C0*7C638749216745400587*7CUnknown*7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ*3D*3D*7C0*7C*7C*7C&sdata=6i8OX34Bh82*2FI9c*2BgahDcgPxY*2FDH4Ra4psGPfL54DNs*3D&reserved=0__;JSUlJSUlJSUlJSUlJSUlJSUlJSUlJSUlJSU!!Mih3wA!DPB1e-FJWbMFVPUjtO311vKpiN8_MRIQAWUsTZK5-2UkmOfiHnFuuSWsBWEX86SVF6HBcX5iior_QKwbekzCA4s$ <https://sccn.ucsd.edu/mailman/listinfo/eeglablist>.