The following node is available in the Open Source KNIME predictive analytics and data mining platform version 2.7.1. Discover over 1000 other nodes, as well as enterprise functionality at http://knime.com.
This node saves data to a file in ARFF format. In the configuration dialog, specify a valid destination file. When executed, the node writes the data, coming through its input port, into the specified location. At this point in time, it only writes not-sparse ARFF files (i.e. it always writes out all data, even if its value is zero).
0 | The datatable to be written to the file |