eegcoord {eegkit}

EEG Cap Coordinates

Description

Three-dimensional electroencephalography (EEG) electrode coordinates (measured in cm), and corresponding projection onto two-dimensional xy plane. Contains 84 scalp electrodes, as well as nose and ears.

Usage

data(eegcoord)

Format

A data frame with 87 observations and the following 5 variables:

x

x-coordinate of 3d cap (numeric).

y

y-coordinate of 3d cap (numeric).

z

z-coordinate of 3d cap (numeric).

xproj

Projected x-coordinate of 2d cap (numeric).

yproj

Projected y-coordinate of 2d cap (numeric).

Electrode channel name labels can be obtained using rownames(eegcoord).

Author(s)

Nathaniel E. Helwig <[e-mail]>

Source

Created by Nathaniel E. Helwig (2014) using:

Adler, D., Murdoch, D., and others (2014). rgl: 3D visualization device system (OpenGL). http://CRAN.R-project.org/package=rgl

Oostenveld, R., and Praamstra, P. (2001). The Five percent electrode system for high-resolution EEG and ERP measurements. Clinical Neurophysiology, 112, 713-719.

Schlager, S. & authors of VCGLIB. (2014). Rvcg: Manipulations of triangular meshes (smoothing, quadric edge collapse decimation, im- and export of various mesh file-formats, cleaning, etc.) based on the VCGLIB API. R packge version 0.7.1. http://CRAN.R-project.org/package=Rvcg.

Examples

##########   EXAMPLE   ##########

data(eegcoord)
enames <- rownames(eegcoord)
# plot3d(eegcoord[,1],eegcoord[,2],eegcoord[,3],size=10,col="green")
# text3d(eegcoord[,1],eegcoord[,2],eegcoord[,3],texts=enames,col="blue")
plot(eegcoord[,4],eegcoord[,5],cex=2,col="green",pch=19)
text(eegcoord[,4],eegcoord[,5],labels=enames,col="blue")