Append
Synopsis
This operator builds a merged ExampleSet from two or more compatible ExampleSets by adding all examples into a combined set.
Description
This operator builds a merged ExampleSet from two or more compatible ExampleSets by adding all examples into a combined set. All input ExampleSets must have the same attribute signature. This means that all ExampleSets must have the same number of attributes. Names and roles of attributes should be the same in all input ExampleSets. Please note that the merged ExampleSet is built in memory and this operator might therefore not be applicable for merging huge data set tables from database. In that case other preprocessing tools should be used that aggregate, join, and merge tables into one table which is then used by RapidMiner.
Input
example set
The Append operator can have multiple inputs. When one input port is connected, another **input **port becomes available which is ready to accept another input (if any).This input port expects an ExampleSet. It is output of the Retrieve operator in the attached Example Process. Output of other operators can also be used as input. It is essential that meta data should be attached with the data for the input because attributes are specified in their meta data. The Retrieve operator provides meta data along-with data.
Output
merged set
The merged ExampleSet is delivered through this port.