Very low frequency component, suggests that high pass filter also needed
{"Image DocumentName": "Very low frequency component, suggests that high pass filter also needed", "Image ImageDescription": "If you remove some low frequencies and some high frequencies to leave a range in the middle this is band-pass filtering. I knew that this slow drift could not be stimulus related because the stimulus was occurring every 25 sec, and this trend has a period of about 6 minutes!", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}