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    Hello Makoto and Christian,<br>
    <br>
    Thanks very much for the response!<br>
    <br>
    -Bryce.<br>
    <br>
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            <div class="headerdisplayname" style="display:inline;">Subject:
            </div>
            Re: [Eeglablist] Artifact Subspace Reconstruction (ASR)</td>
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            <div class="headerdisplayname" style="display:inline;">From:
            </div>
            Makoto Miyakoshi <a class="moz-txt-link-rfc2396E" href="mailto:mmiyakoshi@ucsd.edu">&lt;mmiyakoshi@ucsd.edu&gt;</a></td>
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            <div class="headerdisplayname" style="display:inline;">Date:
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            14-10-16 07:58 PM</td>
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            <div class="headerdisplayname" style="display:inline;">To: </div>
            Christian Kothe <a class="moz-txt-link-rfc2396E" href="mailto:christiankothe@gmail.com">&lt;christiankothe@gmail.com&gt;</a></td>
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            <div class="headerdisplayname" style="display:inline;">CC: </div>
            EEGLAB List <a class="moz-txt-link-rfc2396E" href="mailto:eeglablist@sccn.ucsd.edu">&lt;eeglablist@sccn.ucsd.edu&gt;</a>, <a class="moz-txt-link-rfc2396E" href="mailto:bpm@uvic.ca">"bpm@uvic.ca"</a>
            <a class="moz-txt-link-rfc2396E" href="mailto:bpm@uvic.ca">&lt;bpm@uvic.ca&gt;</a></td>
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    <div dir="ltr">That makes perfect sense to me Christian. Thanks! It
      is very informative.
      <div><br>
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      <div>Makoto</div>
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    <br>
    <div class="gmail_quote">On Thu, Oct 16, 2014 at 4:25 PM, Christian
      Kothe <span dir="ltr">&lt;<a
          href="mailto:christiankothe@gmail.com" target="_blank">christiankothe@gmail.com</a>&gt;</span>
      wrote:<br>
      <blockquote class="gmail_quote" style="margin:0 0 0
        .8ex;border-left:1px #ccc solid;padding-left:1ex">
        <div dir="ltr">Hi Bryce,
          <div><br>
          </div>
          <div>there is no serious need to adjust any parameter for
            low-density systems this one. </div>
          <div><br>
          </div>
          <div>However, if you enjoy tuning things, there is a limit on
            what number of artifact components it will maximally remove
            at a given time point, and that number is a fraction of the
            number of channels (MaxDimensions in clean_asr, default
            0.66). So for your 11 channels that's 7 components. If you
            work in a situation where you face more simultaneous
            artifacts than that (e.g., muscle groups) and you absolutely
            have to remove all of them, then you may increase that
            number. However, note that if you remove 7 degrees of
            freedom from your data and have 4 left, you will end up with
            a rather impoverished EEG segment in any case
            (rank-deficient); for offline analysis is might be better to
            have such bad windows removed from the data altogether and
            therefore leave that setting at its defaults -- the
            clean_rawdata plugin will by default remove incompletely
            repaired windows in a final post-process.</div>
          <span class="HOEnZb"><font color="#888888">
              <div><br>
              </div>
              <div>Christian</div>
            </font></span></div>
        <div class="HOEnZb">
          <div class="h5">
            <div class="gmail_extra"><br>
              <div class="gmail_quote">On Thu, Oct 16, 2014 at 4:12 PM,
                Makoto Miyakoshi <span dir="ltr">&lt;<a
                    href="mailto:mmiyakoshi@ucsd.edu" target="_blank">mmiyakoshi@ucsd.edu</a>&gt;</span>
                wrote:<br>
                <blockquote class="gmail_quote" style="margin:0 0 0
                  .8ex;border-left:1px #ccc solid;padding-left:1ex">
                  <div dir="ltr">
                    <div>Dear Christian, </div>
                    <div><br>
                    </div>
                    Should clean_rawdata parameter adjusted from default
                    if you have only 14 channels?
                    <div><br>
                    </div>
                    <div>Makoto
                      <div class="gmail_extra">
                        <div>
                          <div><br>
                            <div class="gmail_quote">On Wed, Oct 15,
                              2014 at 10:13 PM, <a
                                href="mailto:bpm@uvic.ca"
                                target="_blank">bpm@uvic.ca</a> <span
                                dir="ltr">&lt;<a
                                  href="mailto:bpm@uvic.ca"
                                  target="_blank">bpm@uvic.ca</a>&gt;</span>
                              wrote:<br>
                              <blockquote class="gmail_quote"
                                style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">Greetings,<br>
                                <br>
                                I am looking at low-density (11 scalp
                                channels, 3 ocular channels) resting EEG
                                recordings for a longitudinal study. I
                                have been experimenting with the
                                Artifact Subspace Reconstruction
                                extension for cleaning my data, which
                                seems to be working well enough using
                                the default input parameter settings. I
                                cannot find any documentation for ASR
                                and was wondering if perhaps I should be
                                tweaking the input settings because of
                                my low-density array.<br>
                                <br>
                                Thank you for any responses!<br>
                                <br>
                                -Bryce.<br>
                                <br>
                                -- <br>
                                Bryce P Mulligan<br>
                                Clinical Neuropsychology Doctoral
                                Student<br>
                                Neuropsychology &amp; Rehabilitation
                                Laboratory<br>
                                Department of Psychology<br>
                                P.O. Box 1700 STN CSC<br>
                                University of Victoria<br>
                                Victoria BC Canada V8W 2Y2<br>
                                <a href="tel:250-472-4194"
                                  value="+12504724194" target="_blank">250-472-4194</a><br>
                                <a href="mailto:bpm@uvic.ca"
                                  target="_blank">bpm@uvic.ca</a><br>
                                <br>
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                        <span><font color="#888888">-- <br>
                            <div dir="ltr">Makoto Miyakoshi<br>
                              Swartz Center for Computational
                              Neuroscience<br>
                              Institute for Neural Computation,
                              University of California San Diego<br>
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    <pre class="moz-signature" cols="72">-- 
Bryce P Mulligan
Clinical Neuropsychology Doctoral Student
Neuropsychology &amp; Rehabilitation Laboratory
Department of Psychology
P.O. Box 1700 STN CSC
University of Victoria
Victoria BC Canada V8W 2Y2
250-472-4194
<a class="moz-txt-link-abbreviated" href="mailto:bpm@uvic.ca">bpm@uvic.ca</a></pre>
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