d006 <- read.table(here::here("data", "PIXEL.txt"), header = TRUE)D006. Longitudinal data of dog CT scans
The data file can be downloaded here:
This dataset was collected by performing CT scans on dogs (dog) after injecting them intravenously with a dye contrast (Pinheiro and Bates 2000). Scans of the right and left (side) lymph nodes in the axillary region were recorded in form of pixel intensity (pixel). A total of 10 dogs were scanned over a period of 14 days (day).
| dog | side | day | pixel |
|---|---|---|---|
| 1 | R | 0 | 1045.8 |
| 1 | R | 1 | 1044.5 |
| 1 | R | 2 | 1042.9 |
| 1 | R | 4 | 1050.4 |
| 1 | R | 6 | 1045.2 |
| 1 | R | 10 | 1038.9 |
| 1 | R | 14 | 1039.8 |
| 2 | R | 0 | 1041.8 |