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Home MathPack DataTable Methods StandardizeNumCellRows
See also: StandardizeRows 

StandardizeNumCellRows

Unit:SDL_datatable
Class:TDataTable
Declaration:procedure StandardizeNumCellRows (means, stddevs: TVector);

The method StandardizeNumCellRows standardizes the rows of the numeric cells (cells which are neither marked as csNAN, nor as csUndefined) of the data table. This means that the elements of the data matrix are transformed in a way that each row of the matrix has thereafter a zero mean value and unit standard deviation. The mean values, and the standard deviations of all columns are returned in the parameters means and stddevs.

Please note that size of the vector parameters means and stddevs has to be equal to NrOfRows. The parameters means and stddevs may be set to NIL, if these results are not needed.

Hint: Background information on the standardization of data can be found in Fundamentals of Statistics.


Last Update: 2007-Mai-19