In MATH-1045 (https://issues.apache.org/jira/browse/MATH-1045) we have
discussed adding a zero threshold tolerance to EigenDecomposition just
like QRDecomposition has. This involves adding a new constructor with
a new double parameter.
Just one problem: there's already such a constructor:
/**
* Calculates the eigen decomposition of the given real matrix.
*
* @param matrix Matrix to decompose.
* @param splitTolerance Dummy parameter (present for backward
* compatibility only).
* @throws MathArithmeticException if the decomposition of a general matrix
* results in a matrix with zero norm
* @throws MaxCountExceededException if the algorithm fails to converge.
* @deprecated in 3.1 (to be removed in 4.0) due to unused parameter
*/
@Deprecated
public EigenDecomposition(final RealMatrix matrix,
final double splitTolerance)
throws MathArithmeticException {
this(matrix);
}
Reusing this constructor would introduce a functionally incompatible
change, as the previous meaning of this value was different.
What are people's thoughts on proceeding anyway for a minor point
release like 3.3?
Or, best saved for 4.x?
Sean
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