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Write ARFF

Synopsis​

This operator is used for writing an ARFF file.

Description​

This operator can write data in form of ARFF (Attribute-Relation File Format) files known from the machine learning library Weka. An ARFF file is an ASCII text file that describes a list of instances sharing a set of attributes. ARFF files were developed by the Machine Learning Project at the Department of Computer Science of The University of Waikato for use with the Weka machine learning software. Please study the attached Example Processes for understanding the basics and structure of the ARFF file format. Please note that when an ARFF file is written, the roles of the attributes are not stored. Similarly when an ARFF file is read, the roles of all the attributes are set to regular.

Input​

input​

This input port expects an ExampleSet. It is the output of the Retrieve operator in the attached Example Process.

Output​

through​

The ExampleSet that was provided at the input port is delivered through this output port without any modifications. This is usually used to reuse the same ExampleSet in further operators of the process.

file​

This port buffers the file object for passing it to the reader operators

Parameters​

Example set file​

The path of the ARFF file is specified here. It can be selected using the choose a file button.

Encoding​

This is an expert parameter. A long list of encoding is provided; users can select any of them.