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Hi Mike:
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<div class=""><span class="Apple-tab-span" style="white-space:pre"></span>Thank you for your tip, I tried it but I am still the same eeg data as the filtered frequency data:</div>
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<div class=""><span class="Apple-tab-span" style="white-space:pre"></span>Do I still need to do the cfg.frequency setting in the ft_selectdata() call or just the cfg.bpfilter and cfg.bpfreq in the ft_preprocessing() call?</div>
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<div class=""><span class="Apple-tab-span" style="white-space:pre"></span>In case it wasn’t clear in my original email, the eeg.mat data has ALREADY been through the ft_preprocessing() in another script.</div>
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<div class="">Mona</div>
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<div class="">On Feb 2, 2017, at 12:17 PM, Hall, Michael (Research Student) <<a href="mailto:hallmbh@aston.ac.uk" class="">hallmbh@aston.ac.uk</a>> wrote:</div>
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Hi Mona,</p>
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The cfg.frequency parameter in ft_selectdata only works on data with a frequency dimension.</p>
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Try using the cfg.bpfilter = 'yes'; cfg.bpfreq = [0.1 2]; in ft_preprocessing.</p>
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Best wishes,<br class="">
Mike</p>
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Get <a href="https://aka.ms/ghei36" class="">Outlook for Android</a></p>
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From: Wong-Barnum, Mona<br class="">
Sent: Thursday, 2 February, 18:22<br class="">
Subject: [FieldTrip] ft_selectdata<br class="">
To: FieldTrip discussion list<br class="">
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Hi: <br class="">
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I’m trying to do some frequency band filtering on my data using ft_selectdata but it doesn’t seem to be working…the new “filtered” data is the same as the original data.<br class="">
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Here is my code (note the eeg.mat file has been through the ft_preprocessing function):<br class="">
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addpath /path/to/fieldtrip</p>
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ft_defaults<br class="">
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disp ( 'Reading eeg.mat...' )</p>
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data = importdata ( 'eeg.mat' );<br class="">
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disp ( 'Getting low delta band...' )</p>
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cfg = [];</p>
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cfg.frequency = [0.1 2];</p>
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eeg_low_delta = ft_selectdata ( cfg, data );</p>
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disp ( 'Saving eeg_low_delta.mat...' );</p>
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save eeg_low_delta.mat eeg_low_delta -v7.3;<br class="">
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What am I doing wrong? All help is appreciated.<br class="">
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thanks,</p>
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Mona<br class="">
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Mona Wong<br class="">
Web & Mobile Application Developer<br class="">
San Diego Supercomputer Center<br class="">
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"To handle yourself, use your head;<br class="">
to handle others, use your heart."</div>
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<span class="Apple-tab-span" style="white-space: pre;"></span>-- Eleanor Roosevelt</div>
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