This workflow shows an example of parameter optimization in a linear regression model. The different parameters are output as flow variables by the Parameter Optimization Loop Start node. The parameter settings of the linear regression algorithm are overwritten by the flow variables and trees with different settings are trained. Since this is a binary classification we can use the Numeric Scorer node and create a flow variable with the performance metric in each iteration. This is then fed into the Parameter Optimization Loop End node. The end node compares the accuracies and supplies the best value in the first output.