<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">
Hi Luisa,
<div class=""><br class="">
</div>
<div class="">The minimum requirement for a data structure that fieldtrip can work with should contain at least the following fields:</div>
<div class=""><br class="">
</div>
<div class="">- a field with the data matrix, in your case it can be cohspctrm</div>
<div class="">- a bunch of fields that indicate how to interpret the dimensions of the input data matrix:</div>
<div class=""> * dimord, a descriptor in the style of ‘chancmb_freq_time’</div>
<div class=""> * freq</div>
<div class=""> * time</div>
<div class=""> * labelcmb (for univariate data, it should be label)</div>
<div class=""><br class="">
</div>
<div class="">The cfg should be optional.</div>
<div class=""><br class="">
</div>
<div class="">Anyway, this being said, probably you may want to try and fool fieldtrip into getting a univariate data-field, i.e. rename cohspctrm into powspctrm, and labelcmb into label. This should work under the assumption that you are cohering 8 different
EEG electrodes with a single EMG (for the label you could just take the column of labelcmb that represents the EEG).</div>
<div class=""><br class="">
</div>
<div class="">Best wishes,</div>
<div class=""><br class="">
</div>
<div class="">Jan-Mathijs</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class=""> </div>
<div class="">
<div class="">
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">
J.M.Schoffelen, MD PhD<br class="">
Senior Researcher, VIDI-fellow - PI, language in interaction<br class="">
Telephone: +31-24-3614793</div>
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">
Physical location: room 00.028</div>
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">
Donders Centre for Cognitive Neuroimaging, Nijmegen, The Netherlands<br class="">
<br class="">
<br class="">
</div>
</div>
</div>
</div>
<div>
<blockquote type="cite" class="">
<div class="">On 31 May 2017, at 04:28, Luisa Roeder <<a href="mailto:l.roeder@qut.edu.au" class="">l.roeder@qut.edu.au</a>> wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div class="WordSection1" style="page: WordSection1; 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;">
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
Dear Fieldtrip users,<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<o:p class=""> </o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
I am part of a research team at the Institute of Health and Biomedical Innovation at Queensland University of Technology in Brisbane, Australia. I am currently working on time-frequency analyses of EEG and EMG signals.<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<o:p class=""> </o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
I would like to use ft_freqstatistics for a cluster-based permutation test on my time-frequency data.<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
In the function itself and in the online documentation I read that the input data into ft_freqstatistics should be the result/output from either FT_FREQANALYSIS, FT_FREQDESCRIPTIVES or from FT_FREQGRANDAVERAGE.<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
I have not completed my time-frequency analysis via fieldtrip; hence, I am wondering if it is also possible to create my own input data structure to make it fit for ft_freqstatistics?<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
(Basically, I would like to skip ft_freqanalysis and directly start with cluster-based permutation testing via ft_freqstatistics, and for that I need to adapt my data structure.) If it is possible, which fields have to be created in my variable to be fed into
ft_freqstatistics, so it fulfils all requirements to make the function run?<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
Are there any fields from the output of, for example, FT_FREQANALYSIS that are not needed for ft_freqstatistics?<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<o:p class=""> </o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
For example,<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
[stat] = ft_freqstatistics(cfg, coh1, coh2, ...)<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<o:p class=""> </o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
What fields do coh1, coh2, … have to have? E.g.<span class="Apple-converted-space"> </span><o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<o:p class=""> </o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
>> display(coh1)<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
labelcmb: {8×2 cell}<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
dimord: 'chancmb_freq_time'<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
cohspctrm: [8×80×2049 double]<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
time: [1×2049 double]<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
freq: [1×80 double]<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
elec: [1×1 struct]<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
cfg: [1×1 struct]<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<o:p class=""> </o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
Can I leave out some of these fields (particularly coh1.cfg), and it will still work for ft_freqstatistics?<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
Would it be enough to only have coh1.cohspctrm, coh1.time and coh1.freq?<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<o:p class=""> </o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
I am still relatively new to Fieldtrip, and working my way through the tutorials etc., but I definitely having trouble to create an appropriate data structure as input into ft_freqstatistics (without using ft_freqanalysis or other functions alike beforehand).
I would very much appreciate your help with this.<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<o:p class=""> </o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
Thank you,<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
Kind regards<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
Luisa<o:p class=""></o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<o:p class=""> </o:p></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<b class=""><span style="font-size: 10pt;" class="">Luisa Roeder, PhD</span></b><span style="font-size: 10pt;" class=""><span class="Apple-converted-space"> </span>|<span class="Apple-converted-space"> </span></span><span style="font-size: 10pt;" class="">Research
Associate | Movement Neuroscience</span><span style="font-size: 10pt; color: rgb(31, 73, 125);" class=""><o:p class=""></o:p></span></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 10pt;" class="">Institute of Health and Biomedical Innovation | School of Exercise and Nutrition Science</span><span style="font-size: 10pt; color: rgb(31, 73, 125);" class=""><o:p class=""></o:p></span></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 10pt;" class="">Queensland University of Technology | 60 Musk Ave, Kelvin Grove, Brisbane, QLD 4059, Australia.</span><span style="font-size: 10pt; color: rgb(31, 73, 125);" class=""><o:p class=""></o:p></span></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<b class=""><span style="font-size: 10pt;" class="">t:</span></b><span style="font-size: 10pt;" class=""><span class="Apple-converted-space"> </span>+61 7 3138 6428 |<span class="Apple-converted-space"> </span><b class="">e:<span class="Apple-converted-space"> </span><a href="mailto:l.roeder@qut.edu.au" style="color: purple; text-decoration: underline;" class=""><span style="color: blue;" class="">l.roeder@qut.edu.au</span></a><span class="Apple-converted-space"> </span></b>|<span class="Apple-converted-space"> </span><b class="">w:</b><span class="Apple-converted-space"> </span><b class=""><a href="http://www.ihbi.qut.edu.au/" style="color: purple; text-decoration: underline;" class=""><span style="color: blue;" class="">www.ihbi.qut.edu.au</span></a></b><o:p class=""></o:p></span></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 10pt;" class="">CRICOS No. 00213J</span><span class=""><o:p class=""></o:p></span></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<o:p class=""> </o:p></div>
</div>
<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>
</blockquote>
</div>
<br class="">
</div>
<br class="">
<br class="">
</body>
</html>