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Problems reading HierarchicalClusterModel
Contributor II
Hello together,
I have created a model with AgglomerativeClustering and saved it as a file. It is a DendogramHierarchicalClusterModel as defined in AgglomerativeClustering. If I want to load the model with ClusterModelReader, I receive an exception:
[Fatal] Process failed: operator cannot be executed (com.rapidminer.operator.clustering.DendogramHierarchicalClusterModel cannot be cast to com.rapidminer.operator.clustering.ClusterModel). Check the log messages...
If I look into ClusterModelReader, I see that it casts ClusterModel on the loaded object (function read(), line "return (ClusterModel)ioReader.read();"). And DendogramHierarchicalClusterModel is not an extension of ClusterModel.
I have the version 4.5 and saw the same source for 4.6. Is it correct?
Regards,
Igor
I have created a model with AgglomerativeClustering and saved it as a file. It is a DendogramHierarchicalClusterModel as defined in AgglomerativeClustering. If I want to load the model with ClusterModelReader, I receive an exception:
[Fatal] Process failed: operator cannot be executed (com.rapidminer.operator.clustering.DendogramHierarchicalClusterModel cannot be cast to com.rapidminer.operator.clustering.ClusterModel). Check the log messages...
If I look into ClusterModelReader, I see that it casts ClusterModel on the loaded object (function read(), line "return (ClusterModel)ioReader.read();"). And DendogramHierarchicalClusterModel is not an extension of ClusterModel.
I have the version 4.5 and saw the same source for 4.6. Is it correct?
Regards,
Igor
0
Answers
I would suggest using the IOWriter and Reader instead. I think the problem should be fixed anyway.
Greetings,
Sebastian
thanks, it works now! Another suggestion: maybe you can handle the missing ID attribute for AgglomerativeClustering in a more intelligent / understandable way - if I just apply this clustering for my data without ID attribute, I get a NullPointerException. Only after the exact look into the code I understood that IdTagging was required.
For DBScanAlgorithm I see in the manual e.g. "If no id attribute is present, the operator will create one" - maybe it's a good way also for other clustering methods..
Cheers,
Igor
this has already be done for the RapidMiner 5.0
Greetings,
Sebastian