scale_med {fMRItools} | R Documentation |
Centers and scales the columns of a matrix robustly
scale_med(mat, TOL = 1e-08, drop_const = TRUE, doRows = FALSE)
mat |
A numeric matrix. Its columns will be centered and scaled. |
TOL |
Columns with MAD below this value will be considered constant.
Default: |
drop_const |
Drop constant columns? Default: |
doRows |
Center and scale the rows instead? Default: |
Centers each column on its median, and scales each column by its median
absolute deviation (MAD). If there are constant-valued columns, they are
removed if drop_const
or set to NA
if !drop_const
, and
a warning is raised. If all columns are constant, an error is raised.
The input matrix with its columns centered and scaled.