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<p class="MsoNormal">Dear Fieltrippers, </p>
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<div>I did a pilot study on one participant today. Now that I'm trying to analyze my data, I realize that the size file is too big for my computer (size = 3Gb). Even after one hour, the filters (high pass + low pass) were not yet achieved. </div>
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<div>So I would like to see how to reduce the size of my sample BEFORE the filters.</div>
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<div>I know that there is "ft_resampledata", and I did it to reduce the actual sample rate (= 2048) to 256. However, even with this procedure my computer is crashing (even with 16 Go RAM). In addition, I'm not sure that I can resample before filtering (I read
different informations). </div>
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<div>Another way I was thinking about was to pre-select electrodes that I need (only 6 electrodes on 64). But here I have two questions:</div>
<div>- Can I pre-process only some electrodes? Does it really reduce size for next preprocesses?</div>
<div>- Is this the correct way to ask? As it crashes, not sure it works.</div>
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<div style="margin: 0px; font-size: 10px; font-family: Courier; "> cfg = [];</div>
<div style="margin: 0px; font-size: 10px; font-family: Courier; "> cfg.dataset = [ file.name];</div>
<div style="margin: 0px; font-size: 10px; font-family: Courier; "> cfg.channel =
<span style="color: #b245f3">'B5'</span>, <span style="color: #b245f3">'B6'</span>,
<span style="color: #b245f3">'B15'</span>, <span style="color: #b245f3">'B16'</span>;</div>
<div style="margin: 0px; font-size: 10px; font-family: Courier; "> allData_prepross = ft_preprocessing(cfg);</div>
<div style="margin: 0px; font-size: 10px; font-family: Courier; "> cfg.resamplefs = 256;</div>
<div style="margin: 0px; font-size: 10px; font-family: Courier; "> DataSample = ft_resampledata(cfg, allData_prepross)</div>
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<div>I would appreciate pieces of advice!</div>
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<div>Many thanks :)</div>
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<div>Emilie</div>
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