Loop (While)
(Operator Toolbox)
Synopsis
A loop operator which runs until a stopping criterion is met.Description
This operator allows you to run a loop operation, which only stops if a certain condition is met. The condition is provided by the user as an expression. Commonly you use macros to trigger the stop condition.Input
exa (Data table)Input data sets passed through to the inner process
Output
- exa (Data table)
Output of the loop.
Parameters
- stop expression Expression which is evaluated at the start of each run of the inner operator. The loop ends once this expression is returning true.
- use maximum execution time If set to true the maximum runtime is configurable. If set to false the operator can run forever, if the condition is never met.
- max execution time Maximum run time of the operator in seconds. Only available if use_maximum_execution_time is set to true.
Tutorial Processes
Feature Selection with Loop (While)
This tutorial process creates a feature selection similar to backwards elimination using the Loop (While) operator. In the process we eliminate one column at a time using the weights of a GLM. In each iteration the attribute which contributes the least to the model is eliminated.
