| subjectCenteringTransform {superb} | R Documentation |
subject-centering transform
Description
subjectCenteringTransform is a transformation that can
be applied to a matrix of data. the resulting matrix have means
that are centered on the grand mean, subject-wise (Cousineau 2005).
Usage
subjectCenteringTransform(dta, variables)
Arguments
dta |
a data.frame containing the data in wide format; |
variables |
a vector of column names on which the transformation will be applied. the remaining columns will be left unchanged |
Value
a data.frame of the same form as dta with the variables transformed.
This function is useful when passed to the argument preprocessfct of superbPlot()
where it performs a modification of the data matrix.
References
Cousineau D (2005). “Confidence intervals in within-subject designs: A simpler solution to Loftus and Masson's method.” Tutorials in Quantitative Methods for Psychology, 1, 42 – 45. doi:10.20982/tqmp.01.1.p042.