<div dir="ltr">Dear Bethel,<div><br></div><div>Sorry for the trouble.</div><div><br></div><div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">> When I open the recording the eegplot just snap to certain</div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">scale which do not necessary allow me to correctly visualise the data</div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">amplitude. Using the +- buttons to change the scale does not have any</div><div style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">effect.</div><br></div><div>My initial guess is that the data have huge DC drift.</div><div>Try this: in eegplot() GUI, in the top tab, [Display] -> [Remove DC offset].</div><div><br></div><div><span style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">> This could be because the amplitude in some channels are very high compared with others.</span><br></div><div><br></div><div>Even if amplitude is high, as long as they are AC they should frequently cross the zero line, hence I guessed DC offset is present. If you recorded the data without using high-pass filter... DC drift could be up to 10,000 uV. High-pass filter removes it as well. Try these solutions and let me know if it works.</div><div><br></div><div>Makoto</div><br><div class="gmail_quote"><div dir="ltr">On Thu, Jul 12, 2018 at 10:32 AM Bethel Osuagwu <<a href="mailto:bethel.osuagwu@gmail.com">bethel.osuagwu@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Dear All,</div><div>I posted this some time ago and had no response; I am posting again because I think this could be a bug.</div><div><br></div><div>I am using EEGLAB(v13.5.4b) to process data and am struggling to scale trace</div><div>amplitudes. When I open the recording the eegplot just snap to certain</div><div>scale which do not necessary allow me to correctly visualise the data</div><div>amplitude. Using the +- buttons to change the scale does not have any</div><div>effect. Also using the input field to change the scale does not work as the</div><div>input field only snap to certain values. This could be because the amplitude in some channels are very high compared with others. I keep having to plot the data using matlab plot in other to visualise it.</div><div><br></div><div>How can I change the scale to any arbitrary value so to see the trace</div><div>amplitudes nicely?</div><div><br></div><div>Thanks</div><div><br></div><div><br></div>-- <br><div class="m_-8712448869364323724gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><font face="tahoma, sans-serif" style="font-size:12.8px"><font color="#000000" size="1"><b>Bethel A. C. Osuagwu</b></font></font><div style="font-size:small"><font face="tahoma, sans-serif" size="1">Clinical Research Fellow</font></div><div style="font-size:12.8px"><font face="tahoma, sans-serif" size="1"><br></font></div><div style="font-size:12.8px"><font face="tahoma, sans-serif" size="1"><b>Stoke Mandeville Spinal Research</b></font></div><div style="font-size:12.8px"><font face="tahoma, sans-serif" size="1">National Spinal Injuries Centre</font></div><div style="font-size:12.8px"><font face="tahoma, sans-serif" size="1">Mandeville Road</font></div><div style="font-size:12.8px"><font face="tahoma, sans-serif" size="1">Aylesbury</font></div><div style="font-size:12.8px"><font face="tahoma, sans-serif" size="1">Bucks</font></div><div style="font-size:12.8px"><font face="tahoma, sans-serif" size="1">HP21 8AL</font></div><div><font face="tahoma, sans-serif" size="1">Tel: 01296 31 5963 (</font><span style="font-family:tahoma,sans-serif;font-size:x-small">Applied NeuroLab)</span><font face="tahoma, sans-serif" size="1"><br></font></div><div style="font-size:12.8px"><font face="tahoma, sans-serif" size="1"><b><u><a href="http://lifeafterparalysis.com/" style="color:rgb(17,85,204)" target="_blank">lifeafterparalysis.com</a></u></b></font></div><div style="font-size:12.8px"><font face="tahoma, sans-serif"><div style="color:rgb(0,0,0);display:inline"><font size="1">@lifeafterpara</font></div><br></font></div><div style="font-size:12.8px"><font face="tahoma, sans-serif" size="1"><b><u><a href="http://justgiving.com/smsr" style="color:rgb(17,85,204)" target="_blank">justgiving.com/smsr</a></u></b></font></div></div></div></div></div></div></div>
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