2_central_tendency
- center — center
 
- geomean — geometric mean
 
- harmean — harmonic mean : inverse of the inverses average (without zeros)
 
- mean — матожидание всех значений или матожидания по заданной размерности
 
- meanf — weighted mean of a vector or a matrix
 
- median — median (row median, column median,...) of
            vector/matrix/array entries
 
- trimmean — trimmed mean of a vector or a matrix
 
- wcenter — center and weight