The method MeanCenterNumCellColumns transforms the columns of the numeric cells (cells which are neither marked as csNAN, nor as csUndefined) of the data table in a way that each row of the matrix has thereafter a zero mean. The original means of all columns are returned in the parameter Means. Columns which contain nominal or ordinal values are left unchanged. The length of the Means array is automatically adjusted to the number of columns of the matrix.
