Gilles created MATH-911:
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Summary: Remove usage of "DerivativeStructure" in the
"optimization" package
Key: MATH-911
URL: https://issues.apache.org/jira/browse/MATH-911
Project: Commons Math
Issue Type: Task
Reporter: Gilles
Priority: Minor
Fix For: 3.1
The "DerivativeStructure" class is not the proper interface towards user
applications that deal with optimization problems.
Recent changes implies copying between e.g. the user's representation of a
Jacobian and the "DerviativeStructure" representation of the same data. And,
actually, the current implementation of "AbstractLeastSquaresOptimizer" copies
back the "DerviativeStructure" representation into a "double[][]" for internal
use.
[~kberlin] pointed out the potential storage inefficiencies in large-scale
problems.
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