I want to generate Document-Term Matrix for 2000 documents using Weka. It is giving following error due to having more than 30000 features available in the dataset.
org.rosuda.REngine.REngineException: Parse error org.rosuda.REngine.REngineException: Parse error org.rosuda.REngine.JRI.JRIEngine.parse(JRIEngine.java:262) org.rosuda.REngine.REngine.parseAndEval(REngine.java:101) org.rosuda.REngine.REngine.parseAndEval(REngine.java:108) weka.core.RSessionImpl.parseAndEval(RSessionImpl.java:699) weka.core.RSession.parseAndEval(RSession.java:361) weka.core.RUtils.instancesToDataFrame(RUtils.java:115) weka.gui.beans.JavaGDConsolePanel.pushInstancesToR(JavaGDConsolePanel.ja va:771) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) java.lang.reflect.Method.invoke(Unknown Source) weka.gui.explorer.ExplorerRConsolePanel.setInstances(ExplorerRConsolePan el.java:133) weka.gui.explorer.Explorer$1.propertyChange(Explorer.java:261) java.beans.PropertyChangeSupport.fire(Unknown Source) java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source) java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source) weka.gui.explorer.PreprocessPanel$14.run(PreprocessPanel.java:535) java.awt.event.InvocationEvent.dispatch(Unknown Source) java.awt.EventQueue.dispatchEventImpl(Unknown Source) java.awt.EventQueue.access$500(Unknown Source) java.awt.EventQueue$3.run(Unknown Source) java.awt.EventQueue$3.run(Unknown Source) java.security.AccessController.doPrivileged(Native Method) java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) java.awt.EventQueue.dispatchEvent(Unknown Source) java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
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Selected Use an artificial time index Data too large to calculate PCA. Defaulting to a random projection.
How to solve it?
Your exception is due to the RPlugin package for WEKA. If you do not require access to R from WEKA, uninstall that package to avoid this exception.