brain {gamair} | R Documentation |
Functional magnetic resonance imaging measurements for a human brain subject to a particular experimental stimulus. One slice of the image is provided, described as a near-axial slice through the dorsal cerebral cortex.
data(brain)
A data frame with 5 columns and 1567 rows. Each row refers to one `voxel' of the image. The columns are:
0
is the base
region; 1
is the
region of interest; 2
is the region activated by the experimental
stimulus; NA
denotes a voxel with no allocation.See the source article for fuller details.
S. Landau et al (2003) `Tests for a difference in timing of physiological response between two brain regions measured by using functional magnetic resonance imaging'. Journal of the Royal Statistical Society, Series C, Applied Statistics, 53(1):63-82