<div dir="ltr">Cool thanks. I've uploaded some sample data (about 10 seconds worth), plus a script that filters and plots one of the channels (I noticed that not all channels have these artifacts in them). <br><div><br><a href="https://www.dropbox.com/sh/sioktvo8qf8y4yl/AAAqBBtlzB5w2nQevtdsdaC1a?dl=0">https://www.dropbox.com/sh/sioktvo8qf8y4yl/AAAqBBtlzB5w2nQevtdsdaC1a?dl=0</a><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jun 23, 2015 at 5:54 PM, Eric Larson <span dir="ltr"><<a href="mailto:larson.eric.d@gmail.com" target="_blank">larson.eric.d@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">If you can share data via Dropbox or something else, we could also take a look that way. </p><span class="HOEnZb"><font color="#888888">
<p dir="ltr">Eric<br>
</p></font></span><div class="HOEnZb"><div class="h5">
<div class="gmail_quote">On Jun 23, 2015 5:17 PM, "Alan" <<a href="mailto:leggitta3@gmail.com" target="_blank">leggitta3@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div><div>Eric,<br><br></div>I'm unable to reproduce the error using the sample data, I even tried using the sample bdf file we use for testing. So this must be some exciting feature of my data which I'll have to look into.<br><br><br></div>Chris,<br><br></div>I don't do any reshaping.<br><br></div><br></div>Thank you both for your help.<br></div>-Alan<br><div><div><div><div><br></div></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jun 23, 2015 at 2:30 PM, Chris Holdgraf <span dir="ltr"><<a href="mailto:choldgraf@berkeley.edu" target="_blank">choldgraf@berkeley.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Are you reshaping your data at any point in that pipeline? I've had stuff like that happen to me when I accidentally reshaped in a way such that it creates "jumps" in my data...</div><div class="gmail_extra"><br><div class="gmail_quote"><span>On Tue, Jun 23, 2015 at 10:21 AM, Alan <span dir="ltr"><<a href="mailto:leggitta3@gmail.com" target="_blank">leggitta3@gmail.com</a>></span> wrote:<br></span><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><div dir="ltr">Hey all,<br>
<br>
I should preface this by saying that I know very little about filtering.<br>
<br>
I observed some strange artifacts when trying to filter my data using method='fft'. I played around with this and found that these artifacts only seemed to be present when I used filter_length < '10s'.<br>
<br>
The obvious solution is to use method='iir' or filter_length >= '10s', but I’m wondering if there’s a reason I might expect these artifacts to occur and if we could incorportate a warning into the filter function.<br>
<br>
I've attached an example of these artifacts from a filter length of '1s', with the original signal in blue and the filtered signal in green.<br>
<br>
Thanks!<span><font color="#888888"><br>
Alan</font></span></div>
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