Loop Data Sets
Synopsis
This operator iterates over its subprocess for every ExampleSet given at its input ports.
Description
The subprocess of the Loop Data Sets operator executes n number of times where n is the number of ExampleSets provided as input to this operator. You must have basic understanding of Subprocesses in order to understand this operator. For more information regarding subprocesses please study the <reference key="operator.subprocess">Subprocess</reference> operator. For each input ExampleSet the Loop Data Sets operator executes the inner operators of the subprocess like an operator chain. This operator can be used to conduct a process consecutively on a number of different data sets. If the only best parameter is set to true then only the results generated during the iteration with best performance are delivered as output. For this option it is compulsory to attach a performance vector to the performance port in the subprocess of this operator. The Loop Data Sets operator uses this performance vector to select the iteration with best performance.
Input
example set
This operator can have multiple inputs. When one input is connected, another input port becomes available which is ready to accept another ExampleSet (if any). The order of inputs remains the same. The ExampleSet supplied at the first input port of this operator is available at the first input port of the nested chain (inside the subprocess). Do not forget to connect all inputs in correct order. Make sure that you have connected the right number of ports at the subprocess level.
Output
output
The Loop Data Sets operator can have multiple output ports. When one output is connected, another output port becomes available which is ready to deliver another output (if any). The order of outputs remains the same. The Object delivered at the first output port of the subprocess is delivered at the first output of the outer process. Do not forget to connect all outputs in correct order. Make sure that you have connected the right number of ports at all levels of the chain.
Parameters
Only best
If the only best parameter is set to true then only the results generated during the iteration with the best performance are delivered as output. For this option it is compulsory to attach a performance vector to the performance port in the subprocess of this operator. The Loop Data Sets operator uses this performance vector to select the iteration with the best performance.