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DiscriminantAnalysis.Downdate Method (Double[,],Int32[],Int32[],Double[])
Removes a set of observations and associated frequencies and weights from the discriminant functions.

Namespace: Imsl.Stat
Assembly: ImslCS (in ImslCS.dll) Version: 6.5.2.0
Syntax
public void Downdate(
	double[,] x,
	int[] group,
	int[] frequencies,
	double[] weights
)

Parameters

x
Type:System.Double[,]
A double matrix containing the observations to be removed, with at least nVariables columns. The columns indicated in varIndex correspond to the variables.
group
Type:System.Int32[]
An int array containing the group numbers. The groups must be numbered 1,2, ..., nGroups for each observation.
frequencies
Type:System.Int32[]
An int array containing the associated frequencies for each observation.
weights
Type:System.Double[]
A double array containing the associated weights for each observation.
Exceptions
ExceptionCondition
SumOfWeightsNegException is thrown when the sum of the weights have become negative.
See Also