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Hi Mats,
<div>It all pertains, as I implied earlier, to what the data looks like after the application of the specific algorithmic parameters (and the Z-scoring). I think the discussion would benefit if you show us some screenshots with the ‘interactive’ figure that
illustrates your problem. Note that you pasted code in an earlier e-mail that used ft_artifact_zvalue_old. In my comment with respect to a newer version of the code, I meant the use of the suffix ‘old’.</div>
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<div>BW,</div>
<div>JM</div>
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<div>On Jul 10, 2015, at 2:19 PM, Es, M.W.J. van (Mats) <<a href="mailto:M.vanEs@donders.ru.nl">M.vanEs@donders.ru.nl</a>> wrote:</div>
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<div style="direction: ltr; font-family: Tahoma; font-size: 10pt;">Hi Jan Matthijs,
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<div>I do not think that the problem lies in the size of the jump: when I artificially create a very large jump in my data the jump is also not detected, see code.</div>
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<div><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8000001907349px; background-color: rgb(255, 255, 255);">data_short.trial{1}(132,1:700)</span><wbr style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8000001907349px; background-color: rgb(255, 255, 255);"><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8000001907349px; background-color: rgb(255, 255, 255);">=0;
%channel 132 is MRC11</span><br style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8000001907349px; background-color: rgb(255, 255, 255);">
<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8000001907349px; background-color: rgb(255, 255, 255);">data_short.trial{1}(132,701:</span><wbr style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8000001907349px; background-color: rgb(255, 255, 255);"><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8000001907349px; background-color: rgb(255, 255, 255);">1441)=1;
%data 'jumps' up to 1 and stays there (massively bigger jump than actual squid jump).</span></div>
<div><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8000001907349px; background-color: rgb(255, 255, 255);">You are right that if the 'muscle' algorithm picks up the jump, there is no problem. However, I don't know if this
algorithm picks up the jumps consistently. (I did find 10 jumps in one dataset and zero in another, which I know is plausible but still).</span></div>
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<div><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8000001907349px; background-color: rgb(255, 255, 255);">About my code: could you refer me to the newer version of the code? The code I use was on the fieldtrip tutorial </span><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8000001907349px; background-color: rgb(255, 255, 255);">(</span><font color="#222222" face="arial, sans-serif" style="font-size: 13.3333330154419px;"><span style="font-size: 12.8000001907349px;"><a href="http://www.fieldtriptoolbox.org/tutorial/automatic_artifact_rejection">http://www.fieldtriptoolbox.org/tutorial/automatic_artifact_rejection</a>).</span></font><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8000001907349px; background-color: rgb(255, 255, 255);"> </span></div>
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<div><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8000001907349px; background-color: rgb(255, 255, 255);">Best,</span></div>
<div><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8000001907349px; background-color: rgb(255, 255, 255);">Mats</span></div>
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Jan-Mathijs Schoffelen, MD PhD, Senior researcher
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Max Planck Institute for Psycholinguistics<br>
Donders Centre for Cognitive Neuroimaging</div>
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E-mail: <a href="mailto:j.schoffelen@donders.ru.nl">j.schoffelen@donders.ru.nl</a><br>
Telephone: +31-24-3614793<br>
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<a href="http://www.hettaligebrein.nl">http://www.hettaligebrein.nl</a></div>
<div><a href="http://www.fieldtriptoolbox.org">http://www.fieldtriptoolbox.org</a></div>
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