erpR (version 0.2.0)

erpR-package: erpR package

Description

The erpR package includes a series of functions for importing Event-related potential (ERP) data, carrying out exploratory analyses, computing traditional ERP measures and ERP plotting.

Details

Package:

erpR

Type:

Package

Version:

0.2.0

Date:

2014-05-14

License:

GPL-3

The erpR package is dedicated to the analysis of event-related potentials (ERPs). Event-related potentials are the measured brain responses associated with a specific sensory, cognitive, or motor event and are obtained from electroencephalographic (EEG) signal. The erpR package contains a series of functions for importing Event-related potentials (ERP) data, carrying out exploratory analyses, computing traditional ERP measures and ERP plotting. Many erpR functions require to specify two arguments: base and numbers. The names of the objects for the erpR functions are obtained from the combination of base and numbers. The argument base typically indicates the name of the experimental condition (or group, or both), while numbers indicate the numbers of the subjects on which function is applied. This system is crucial to keep order in objects and files names and to tell erpR the correspondence between the objects. In particular a given base will always refer to the same condition, and a given number will always refer to the same subject. The data frames containing ERP data (named by the combination of base and number) are stored in lists called erplists. The topoplot function of this package uses the function interp of package akima, that is released under a non-commercial use license.

Further information can be found on the maintainer's site https://sites.google.com/site/giorgioarcara/erpr.

Examples

library(erpR)

data(ERPsets)

word=grandaverage("Exp1_word_subj", 1:20, erplist=ERPsets) 


erp(word$Fp1, smo=0, col="blue", startmsec=-200, endmsec=1500, ylim=c(-10,10))