Residual

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Programming DataLab

DLabPascal

Mathematical Functions

Curve Fitting

Properties

Residual

See also: CalcRegModel, Predict, StdDevResid

Index

Statistical Background

Residual

Declaration:

TCurveFit.Residual [ix: integer]: double;

The read-only array property Residual returns the residuals for previously calculated model. The parameter ix specifies the residual for the ix^th data point. It may assume values between 1 and NumData. For ix values outside this range Residual returns a zero value.

Hint: Please note that the residuals are only calculated by the method CalcRegModel. Specific regression methods, such as CalcLinFit or CalcParabolFit do not calculate the residuals. If you try to retrieve the residuals after any regression call other than CalcRegModel zero residual values will be returned.