Mean pixel intensity of the right and left lymphnodes in the axillary region obtained from CT scans of 10 dogs over a period of 14 days after intravenous application of a contrast.
This data frame contains the following columns:
These data are from an experiment conducted by Deborah Darien, Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin - Madison.
Pixel$Side.r <- as.integer(Pixel$side == "r") Pixel$Side.l <- as.integer(Pixel$side == "l") Pixel.lme <- lme(fixed = pixel ~ day + day^2, random = ~ Side.r + Side.l + day, cluster = ~ Dog, data = Pixel)