grandaverage.se {erpR} | R Documentation |
A function to average ERP objects, i.e. data frames with timepoints in rows, electrodes in columns and amplitude values in each cell. It is used to compute the grandaverage.se across several subjects, for plotting purposes.
grandaverage.se(base, numbers, electrodes="all", erplist = NULL, NA.sub=TRUE, type="se")
base |
a string indicating the beginning of the name of the |
numbers |
the numbers of subjects to be averaged. |
electrodes |
a character vector indicating the electrodes on which perform the grandaverage.se. Default is |
erplist |
a list containing ERP data frames. |
NA.sub |
In this case, a Warning is displayed. |
type |
currently the only type available is |
A data frame with the standard error of the mean calculated from the subjects specified by the combination of base
and numbers
.
The function keeps track of the name of the objects used to calculated standard error in a comment
.
Giorgio Arcara
data(ERPsets) # compute the average of subjects 1 to 20 for the condition # specified by the string "Exp1_word_subj". word=grandaverage.se("Exp1_word_subj", 1:20, erplist=ERPsets)