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https://issues.apache.org/jira/browse/MATH-1036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13771933#comment-13771933
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Ajo Fod commented on MATH-1036:
-------------------------------
IMHO: This can be extended to higher orders using more complex hashmap key
structure.
> GradStructure: A DerivativeStructure that works for large number of variables.
> ------------------------------------------------------------------------------
>
> Key: MATH-1036
> URL: https://issues.apache.org/jira/browse/MATH-1036
> Project: Commons Math
> Issue Type: Bug
> Reporter: Ajo Fod
> Attachments: GradStructure.java
>
>
> Ran into problems with DerivativeStructure today. It requires a lot of
> memory with 6000 or so independent variables. The problem starts with the
> number of DSCompiler objects instantiated.
> Here is a faster/leaner(less memory) GradStructure that only computes up to
> the first derivative for the case where there are a large number of
> independent variables.
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