brain

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

Data sets and scripts used in the book "Generalized
        Additive Models: An Introduction with R", Wood (2006) CRC.

Simon Wood

gamair

Data for "GAMs: An Introduction with R"

brain function

A data frame with 5 columns and 1567 rows. Each row refers to one `voxel' of
the image. The columns are:
<ul><li>X</li></ul>{ voxel position on horizontal axis.}
<item>Y</item>{ voxel position on vertical axis.}
<item>medFPQ</item>{ median of three replicate `Fundamental 
Power Quotient' values at the voxel: this is the main measurement of brain 
activivity.}
<item>region</item>{code indicating which of several regions of the brain the voxel
belongs to. The regions are defined by the experimenters. <code>0</code> is the base
region; <code>1</code> is the
region of interest; <code>2</code> is the region activated by the experimental 
stimulus; <code>NA</code> denotes a voxel with no allocation.}
<item>meanTheta</item>{mean phase shift at the Voxel, over three measurments.}

format

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

brain: Brain scan data

Description

Usage

Arguments

format

source

Details