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Hi Eva,
<div>The MATLAB error suggests that your data is represented as single precision floating point numbers, and matrix multiplication is apparently not supported when you want to multiply with a sparse matrix.</div>
<div>You could try and convert your data to double precision: data=ft_struct2double(data); and then call ft_channelrepair.</div>
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<div>Best,</div>
<div>Jan-Mathijs</div>
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<div>On Apr 17, 2015, at 1:35 PM, Zita Eva Patai <<a href="mailto:eva.patai@psych.ox.ac.uk">eva.patai@psych.ox.ac.uk</a>> wrote:</div>
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<div>Dear FTers<br>
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I have been trying to fix some bad channels in my data through interpolation.<br>
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It seems to not be working. My code is below.<br>
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Please note my data object is converted from SPM (in case that matters).<br>
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Thanks very much in advance,<br>
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zita<br>
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<span style="font-size:12.8000001907349px">data = </span><br style="font-size:12.8000001907349px">
<br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px"> fsample: 250</span><br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px"> label: {324x1 cell}</span><br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px"> trial: {1x505 cell}</span><br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px"> time: {1x505 cell}</span><br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px"> grad: [1x1 struct]</span><br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px"> triallist: {1x505 cell}</span><br style="font-size:12.8000001907349px">
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<span style="font-size:12.8000001907349px">>> cfg2</span><br style="font-size:12.8000001907349px">
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<span style="font-size:12.8000001907349px">cfg2 = </span><br style="font-size:12.8000001907349px">
<br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px"> badchannel: {2x1 cell}</span><br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px"> method: 'nearest'</span><br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px"> neighbours: [1x306 struct]</span><br style="font-size:12.8000001907349px">
<br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px">>> [interp]=ft_channelrepair(</span><span style="font-size:12.8000001907349px">cfg2,data)</span><br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px">the input is raw data with 324 channels and 505 trials</span><br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px">using gradiometers specified in the data</span><br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px">repairing channel MEG1132</span><br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px"> using neighbour repairing channel MEG1421</span><br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px"> using neighbour </span><br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px">repairing bad channels for 505 trials .</span><span style="font-size:12.8000001907349px;color:rgb(255,0,0)">Error using * </span><br style="font-size:12.8000001907349px">
<span style="font-size:12.8000001907349px;color:rgb(255,0,0)">MTIMES is not supported for one sparse input and one single input.<br>
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Error in ft_channelrepair (line 172)<br>
interp.trial{i} = repair * data.trial{i};</span><br clear="all">
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-- <br>
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<div>Eva Zita Patai, DPhil</div>
<div>Postdoctoral Researcher</div>
<div>Oxford Centre for Human Brain Activity</div>
<div>University of Oxford</div>
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