how can I use feature selection on Knime…

 

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In category Misc in KNIME there is a meta-node Feature Elimination.
This metanode trains a number of models and every time removes the least significant input feature. Is this similar to what you are looking for?

 

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Also have a look at the downloadable example workflow from KNIME: http://knime.org/example-workflows, it’s workflow 002 Data Mining, subsection 002004 – Feature Elimination.

 

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