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QNormalizeColumns


Unit: SDL_matrix
Class: TMatrix
Declaration: procedure QNormalizeColumns (RefQuant: double; Medians, QuantDiffs: TVector);

The method QNormalizeColumns normalizes each column of the matrix by first substracting the median of the column and then by dividing the subtraction results by the difference of the median and the percentile defined by the parameter RefQuant. This means that all elements of each column are shifted and scaled in a way that the cells of any column exhibit a median of zero and a RefQuant-percentile of one.

The column medians and the differences between the medians and percentiles before the normalisation are returned in the vectors Medians and QuantDiffs.



Last Update: 2015-Mai-29