<div dir="ltr">Dear EEGLAB mailinglist:<div><br></div><div>(I am presently learning to use eeglab to analyse MMN-datasets, meaning that my question does partly relate to the erplab extension. I hope that this is acceptable, or that an alternative eeglab-exclusive solution exists.)</div><div><br></div><div>As a step towards familiarising myself with eeglab, I am attempting to make my way through the tutorial for spm/eeg, using eeglab/erplab. To this end I am using the garrido dataset obtainable from <a href="http://www.fil.ion.ucl.ac.uk/spm/data/eeg_mmn/">http://www.fil.ion.ucl.ac.uk/spm/data/eeg_mmn/</a>. The data seems to load fine into eeglab, but for some reason I am running into obstacles when reading the event information?</div><div><br></div><div>after having created the event list, the summary of event codes (outputted by erplab) is</div><div><br></div><div><div>Type 65024 appears   1 times</div><div>Type 65152 appears   1 times</div><div>Type 65216 appears 480 times</div></div><div><br></div><div>However, the eeglab window informs me that there are in fact 601 events. this fits very well with the spm tutorial, which says that the rare stimulus occurs 120 times (and not just 1). upon browsing the event details, either through the generated elist.txt or using edit -> event values, I see that there are indeed much more than 1 occurrence of code "65152". Does anyone know what might be going wrong? clearly the events are there, but eeglab persists in claiming that event "65152" only happens once. An excerpt from the elist.txt looks like: </div><div><br></div><div><div># item<span class="" style="white-space:pre">   </span> bepoch<span class="" style="white-space:pre">   </span>  ecode<span class="" style="white-space:pre">  </span>            label<span class="" style="white-space:pre">   </span>      onset<span class="" style="white-space:pre">    </span>          diff<span class="" style="white-space:pre">       </span>     dura<span class="" style="white-space:pre">       </span>b_flags<span class="" style="white-space:pre">   </span>   a_flags<span class="" style="white-space:pre">       </span>  enable<span class="" style="white-space:pre"> </span>    bin</div><div><br></div><div>1     <span class="" style="white-space:pre"> </span>0     <span class="" style="white-space:pre">  </span>  65024<span class="" style="white-space:pre">  </span>              ""<span class="" style="white-space:pre"> </span>      0.8906<span class="" style="white-space:pre">   </span>      0.00<span class="" style="white-space:pre">     </span>    0.0<span class="" style="white-space:pre"> </span>    00000000     00000000<span class="" style="white-space:pre">     </span>   1<span class="" style="white-space:pre">     </span>[       ]</div><div>2     <span class="" style="white-space:pre">       </span>0     <span class="" style="white-space:pre">  </span>  65152<span class="" style="white-space:pre">  </span>            rare<span class="" style="white-space:pre">    </span>      3.0898<span class="" style="white-space:pre">   </span>   2199.22<span class="" style="white-space:pre">       </span>    0.0<span class="" style="white-space:pre"> </span>    00000000     00000000<span class="" style="white-space:pre">     </span>   1<span class="" style="white-space:pre">     </span>[      1]</div><div>3     <span class="" style="white-space:pre">       </span>0     <span class="" style="white-space:pre">  </span>  65152<span class="" style="white-space:pre">  </span>            rare<span class="" style="white-space:pre">    </span>      4.5898<span class="" style="white-space:pre">   </span>   1500.00<span class="" style="white-space:pre">       </span>    0.0<span class="" style="white-space:pre"> </span>    00000000     00000000<span class="" style="white-space:pre">     </span>   1<span class="" style="white-space:pre">     </span>[      1]</div><div>4     <span class="" style="white-space:pre">       </span>0     <span class="" style="white-space:pre">  </span>  65216<span class="" style="white-space:pre">  </span>            freq<span class="" style="white-space:pre">    </span>      6.0898<span class="" style="white-space:pre">   </span>   1500.00<span class="" style="white-space:pre">       </span>    0.0<span class="" style="white-space:pre"> </span>    00000000     00000000<span class="" style="white-space:pre">     </span>   1<span class="" style="white-space:pre">     </span>[      2]</div><div>5     <span class="" style="white-space:pre">       </span>0     <span class="" style="white-space:pre">  </span>  65152<span class="" style="white-space:pre">  </span>            rare<span class="" style="white-space:pre">    </span>      7.5898<span class="" style="white-space:pre">   </span>   1500.00<span class="" style="white-space:pre">       </span>    0.0<span class="" style="white-space:pre"> </span>    00000000     00000000<span class="" style="white-space:pre">     </span>   1<span class="" style="white-space:pre">     </span>[      1]</div><div>6     <span class="" style="white-space:pre">       </span>0     <span class="" style="white-space:pre">  </span>  65152<span class="" style="white-space:pre">  </span>            rare<span class="" style="white-space:pre">    </span>      9.0898<span class="" style="white-space:pre">   </span>   1500.00<span class="" style="white-space:pre">       </span>    0.0<span class="" style="white-space:pre"> </span>    00000000     00000000<span class="" style="white-space:pre">     </span>   1<span class="" style="white-space:pre">     </span>[      1]</div><div>7     <span class="" style="white-space:pre">       </span>0     <span class="" style="white-space:pre">  </span>  65152<span class="" style="white-space:pre">  </span>            rare<span class="" style="white-space:pre">    </span>     10.5898<span class="" style="white-space:pre">    </span>   1500.00<span class="" style="white-space:pre">       </span>    0.0<span class="" style="white-space:pre"> </span>    00000000     00000000<span class="" style="white-space:pre">     </span>   1<span class="" style="white-space:pre">     </span>[      1]</div><div>8     <span class="" style="white-space:pre">       </span>0     <span class="" style="white-space:pre">  </span>  65152<span class="" style="white-space:pre">  </span>            rare<span class="" style="white-space:pre">    </span>     12.0898<span class="" style="white-space:pre">    </span>   1500.00<span class="" style="white-space:pre">       </span>    0.0<span class="" style="white-space:pre"> </span>    00000000     00000000<span class="" style="white-space:pre">     </span>   1<span class="" style="white-space:pre">     </span>[      1]</div></div><div><br></div><div>(the labels are my doing, using the advanced "create eventlist" interface)</div><div><br></div><div>I hope someone can help clear this up.</div><div><br></div><div>Best regards</div><div>Kaare Mikkelsen</div><div> <br clear="all"><div><div dir="ltr"><font style="background-color:rgb(255,255,255)">--------------------------------------------------------------------</font><div style="font-family:arial;font-size:small">Kaare Mikkelsen, Dr. Phys.</div><div style="font-family:arial;font-size:small">Department of Engineering</div><div style="font-family:arial;font-size:small">Aarhus University<br></div><div>--------------------------------------------------------------------<br></div></div></div>
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