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Hi Jeff,
<div class="">I assume that you have unzipped the data, and have the data (i.e. the ‘SubjectSEF.ds’) in directoryX.</div>
<div class="">You need to specify the full path to the data in cfg.dataset (or your current working directory should be directoryX), i.e. cfg.dataset = ‘directoryX/SubjectSEF.ds’;</div>
<div class="">Hope this helps,</div>
<div class="">Jan-Mathijs</div>
<div class=""><br class="">
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<blockquote type="cite" class="">
<div class="">On 26 Aug 2016, at 01:49, K Jeffrey Eriksen <<a href="mailto:eriksenj@ohsu.edu" class="">eriksenj@ohsu.edu</a>> wrote:</div>
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I am trying to learn how to apply the LCMV beamformer to EEG data. To that end I am starting to go through this tutorial:<o:p class=""></o:p></div>
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<o:p class=""> </o:p></div>
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<a href="http://www.fieldtriptoolbox.org/tutorial/beamformer_lcmv?s%5b%5d=lcmv" style="color: purple; text-decoration: underline;" class="">http://www.fieldtriptoolbox.org/tutorial/beamformer_lcmv?s[]=lcmv</a><o:p class=""></o:p></div>
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<span lang="EN" style="font-size: 12pt; font-family: 'Times New Roman', serif;" class="">I downloaded the data from this link:<o:p class=""></o:p></span></div>
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<span lang="EN" style="font-size: 12pt; font-family: 'Times New Roman', serif;" class="">The ft_definetrial and ft_preprocessing functions require the original MEG dataset, which is available from<span class="Apple-converted-space"> </span><a href="ftp://ftp.fieldtriptoolbox.org/pub/fieldtrip/tutorial/SubjectSEF.zip" title="" style="color: purple; text-decoration: underline;" class=""><span style="color: blue;" class="">ftp://ftp.fieldtriptoolbox.org/pub/fieldtrip/tutorial/SubjectSEF.zip</span></a>.<o:p class=""></o:p></span></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<span lang="EN" style="font-size: 10pt; font-family: 'Courier New';" class="">Then I tried this code:<o:p class=""></o:p></span></div>
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<span lang="EN" style="font-size: 10pt; font-family: 'Courier New';" class=""><o:p class=""> </o:p></span></div>
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<span lang="EN" style="font-size: 10pt; font-family: 'Courier New';" class="">% find the interesting segments of data<o:p class=""></o:p></span></div>
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<span lang="EN" style="font-size: 10pt; font-family: 'Courier New';" class="">cfg = [];<o:p class=""></o:p></span></div>
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<span lang="EN" style="font-size: 10pt; font-family: 'Courier New';" class="">cfg.dataset = 'SubjectSEF.ds';<o:p class=""></o:p></span></div>
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<span lang="EN" style="font-size: 10pt; font-family: 'Courier New';" class="">cfg.trialdef.eventtype = 'Blue';<o:p class=""></o:p></span></div>
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<span lang="EN" style="font-size: 10pt; font-family: 'Courier New';" class="">cfg.trialdef.prestim = .1; % .1 sec prior to trigger<o:p class=""></o:p></span></div>
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<span lang="EN" style="font-size: 10pt; font-family: 'Courier New';" class="">cfg.trialdef.poststim = .2; % .2 sec following trigger<o:p class=""></o:p></span></div>
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<span lang="EN" style="font-size: 10pt; font-family: 'Courier New';" class="">cfg.continuous = 'yes';<o:p class=""></o:p></span></div>
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<span lang="EN" style="font-size: 10pt; font-family: 'Courier New';" class="">cfg = ft_definetrial(cfg);<o:p class=""></o:p></span></div>
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<span lang="EN" style="font-size: 10pt; font-family: 'Courier New';" class=""><o:p class=""> </o:p></span></div>
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and got this output:<o:p class=""></o:p></div>
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<o:p class=""> </o:p></div>
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Warning: could not determine filetype of SubjectSEF.ds<span class="Apple-converted-space"> </span><o:p class=""></o:p></div>
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> In ft_filetype (line 1294)<o:p class=""></o:p></div>
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In dataset2files (line 42)<o:p class=""></o:p></div>
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In ft_checkconfig (line 557)<o:p class=""></o:p></div>
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In ft_definetrial (line 131)<o:p class=""></o:p></div>
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In fieldtrip_test_lcmv (line 13)<span class="Apple-converted-space"> </span><o:p class=""></o:p></div>
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Warning: no trialfun was specified, using ft_trialfun_general<o:p class=""></o:p></div>
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> In ft_definetrial (line 138)<o:p class=""></o:p></div>
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In fieldtrip_test_lcmv (line 13)<span class="Apple-converted-space"> </span><o:p class=""></o:p></div>
<div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
evaluating trialfunction 'ft_trialfun_general'<o:p class=""></o:p></div>
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Error using ft_read_header (line 2248)<o:p class=""></o:p></div>
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unsupported header format "unknown"<o:p class=""></o:p></div>
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<o:p class=""> </o:p></div>
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Error in ft_trialfun_general (line 78)<o:p class=""></o:p></div>
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hdr = ft_read_header(cfg.headerfile, 'headerformat', cfg.headerformat);<o:p class=""></o:p></div>
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<o:p class=""> </o:p></div>
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Error in ft_definetrial (line 177)<o:p class=""></o:p></div>
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[trl, event] = feval(cfg.trialfun, cfg);<o:p class=""></o:p></div>
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<o:p class=""> </o:p></div>
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Error in fieldtrip_test_lcmv (line 13)<o:p class=""></o:p></div>
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cfg = ft_definetrial(cfg);<o:p class=""></o:p></div>
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<o:p class=""> </o:p></div>
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So I am totally lost here. Any suggestions?<o:p class=""></o:p></div>
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<o:p class=""> </o:p></div>
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Thanks,<o:p class=""></o:p></div>
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-Jeff Eriksen<o:p class=""></o:p></div>
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<o:p class=""> </o:p></div>
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<span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">_______________________________________________</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">
<span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">fieldtrip
mailing list</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">
<a href="mailto:fieldtrip@donders.ru.nl" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">fieldtrip@donders.ru.nl</a><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">
<a href="https://mailman.science.ru.nl/mailman/listinfo/fieldtrip" style="color: purple; text-decoration: underline; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">https://mailman.science.ru.nl/mailman/listinfo/fieldtrip</a></div>
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