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"problem using SVDReduction in java code"

Legacy UserLegacy User Member Posts: 0 Newbie
edited May 2019 in Help
Hi,

  My question is regarding the exception stated below:

=====================================================================================
    Exception in thread "main" java.lang.NoClassDefFoundError: Jama/Matrix
at com.rapidminer.operator.features.transformation.JamaDimensionalityReduction.dimensionalityReduction(JamaDimensionalityReduction.java:59)
at com.rapidminer.operator.features.transformation.DimensionalityReducer.apply(DimensionalityReducer.java:66)
at com.rapidminer.operator.Operator.apply(Operator.java:656)
...
Caused by: java.lang.ClassNotFoundException: Jama.Matrix
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
... 5 more

=====================================================================================

This occurs when i integrate my program with the code below:

                                ...
Operator SVD = OperatorService.createOperator("SVDReduction");

IOContainer container = wvtoolOperator.apply(new IOContainer());
container = SVD.apply(container);                        //ERROR OCCURS HERE
ExampleSet exampleSet = container.get(ExampleSet.class);
                                ...

=======================================================================

When i replace "SOMDimensionalityReduction" with "SVDReduction" it works fine. May i know what are the possible causes?

james,
regards

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Answers

  • IngoRMIngoRM Administrator, Moderator, Employee, RapidMiner Certified Analyst, RapidMiner Certified Expert, Community Manager, RMResearcher, Member, University Professor Posts: 1,750  RM Founder
    Hi,

    the SVDReduction needs another library in your project named "Jama.jar" (from the lib directory of RapidMiner). Just add this library to your project together with the rapidminer.jar and the SVDReduction should work.

    Cheers,
    Ingo
  • Legacy UserLegacy User Member Posts: 0 Newbie
    Thank you for your quick reponse. Really appreciate the effort.
    :)

    regards
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