<div dir="ltr">Hello, EEGLABlist<div><br></div>When downsampling the data in a study, we noticed a strange phenomenon.<br><br>Originally, the chart for a specific participant with a specific electrode in a specific condition looked like this with 2048 Hz:<br>
<br><a href="http://imgur.com/2ZrgfjB">http://imgur.com/2ZrgfjB</a><br><br><br>Then, after we downsampled all the data to 512 Hz, it was consistently the case that the magnitude of the graphs changed, yet the shape remained the same, as seen below:<br>
<br><a href="http://imgur.com/1y2Hi9S">http://imgur.com/1y2Hi9S</a><br><br>Notice the Y axis in each chart. It shifts about 12 decibels downwards.<br><br><div>Checking the .datspec files, we noticed there was a difference of about 12 in the values for those specific indices, as well.</div>
<div><br></div><div>Is this difference in magnitude something we should expect? What does the downsampling function cause this kind of change?</div><div><br></div><div><br></div><div><br></div><div><br></div></div>