<font class="Apple-style-span" color="#333399">Hi Ida, </font><div><font class="Apple-style-span" color="#333399"><br></font></div><div><font class="Apple-style-span" color="#333399">Your steps 1 to 4 seem fine, as long as you are feeding cleaned data to the "ICA 1stTime" step.</font></div>
<div><font class="Apple-style-span" color="#333399">After step 4, then you can follow basic steps to get ERP, single-trial, frequency, and dipole info on the extra-clean data,</font></div><div><font class="Apple-style-span" color="#333399">as described in the eeglab tutorial, and the many articles that use eeglab and ICA for their analysis (you can find all of these on Google Scholar).</font></div>
<div><font class="Apple-style-span" color="#333399">Note that there are many choices on how to drop bad epochs when doing your step 4. </font></div><div><font class="Apple-style-span" color="#333399"><br></font></div><div>
<font class="Apple-style-span" color="#333399">If you have not done the eeglab tutorial, it is recommended that you do it, rather than using your fresh data to figure things out.</font></div><div><font class="Apple-style-span" color="#333399">Once you figure out all basic functions and steps with sample data, then I suggest pushing your data through some well-decided steps.</font></div>
<div><font class="Apple-style-span" color="#333399"><br></font></div><div><span class="Apple-style-span" style="color:rgb(51,51,153)">Regarding the "baseline removal" based on the Groppe article, you should look more closely at those articles to determine exactly</span></div>
<div><font class="Apple-style-span" color="#333399">what you are doing and why you are doing it. you may also want to contact the author directly so you have good clarity.</font></div><div><font class="Apple-style-span" color="#333399"><br>
</font></div><div><font class="Apple-style-span" color="#333399">Good luck with your process and looking forward to hearing of your success.</font></div><div><font class="Apple-style-span" color="#333399"><br></font></div>
<div><font class="Apple-style-span" color="#333399">Best wishes,</font></div><div><font class="Apple-style-span" color="#333399">Tarik</font></div><div><font class="Apple-style-span" color="#333399"><br></font><br><div class="gmail_quote">
On Sun, Mar 3, 2013 at 5:29 AM, ida miokovic <span dir="ltr"><<a href="mailto:ida.miokovic@gmail.com" target="_blank">ida.miokovic@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">Dear eeglablist,</span><div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">
<br></div><div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">After reading through many q&a here on eeglab list, I found the recommended literature of Groppe et al regarding baseline removal and went through it.</div>
<div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif"><br></div><div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">
My initial plan was to run ICA on the epoched data 1st time, then to remove bad trials (not the bad components) and then to run ICA second time after which I will hopefully obtain better decomposition. Going through q&a, it wasn't clear to me what is the procedure when ICA is applied 2 times. This is short description of the steps as I understand them at the moment:</div>
<div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">1. data epoching (without any baseline removal)</div><div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">
2. ICA 1st time</div><div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">3. bad trials removal</div><div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">
4. ICA 2nd time</div><div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">5. baseline correction on the whole epochs(?) </div><div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">
</div><div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">And also one more question, if I am interested into finding a certain frequency presence in channels and ICs, is Tools --> Component spectra and maps good option? In the field of "Freq.to analyze" I would put the one of my interest and obtain the components (for example 5 of them) and the channel with the highest power of frequency of my interest. I have to learn more about dipfit, since I think I will actually need the source of the signal of the certain frequency localization...</div>
<div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif"><br></div><div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">
Thank you very much in advance,</div><div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif"><br></div><div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">
Regards,</div><div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif"><br></div><div style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">
Ida</div>
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