The performance value provided by the 'Loop and Average' operator for logging seems to differ from the returned Performance Vector.
Here is my Process:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.1.004">
<context>
<input/>
<output/>
<macros/>
</context>
<operator activated="true" class="process" compatibility="5.1.004" expanded="true" name="Root">
<description>The WeightGuidedFeatureSelection operator uses given input AttributeWeights to determine the order of attribute adding. In this process we use a 10-fold cross validation of a learning scheme as performance evaluation (the inner operator) and combine attribute filtering with a wrapper approach.</description>
<process expanded="true" height="604" width="480">
<operator activated="true" class="retrieve" compatibility="5.1.004" expanded="true" height="60" name="Retrieve" width="90" x="45" y="30">
<parameter key="repository_entry" value="//Samples/data/Polynomial"/>
</operator>
<operator activated="true" class="weight_by_pca" compatibility="5.1.004" expanded="true" height="76" name="PCAWeighting" width="90" x="180" y="30">
<parameter key="normalize_weights" value="false"/>
</operator>
<operator activated="true" class="optimize_selection_weight_guided" compatibility="5.1.004" expanded="true" height="94" name="WeightGuidedFeatureSelection" width="90" x="380" y="30">
<process expanded="true" height="604" width="413">
<operator activated="true" class="loop_and_average" compatibility="5.1.004" expanded="true" height="76" name="Loop and Average" width="90" x="45" y="30">
<parameter key="iterations" value="100"/>
<process expanded="true" height="551" width="697">
<operator activated="true" class="x_validation" compatibility="5.1.004" expanded="true" height="112" name="XValidation" width="90" x="112" y="30">
<parameter key="sampling_type" value="shuffled sampling"/>
<process expanded="true">
<operator activated="true" class="k_nn" compatibility="5.1.004" expanded="true" name="NearestNeighbors">
<parameter key="k" value="5"/>
</operator>
<connect from_port="training" to_op="NearestNeighbors" to_port="training set"/>
<connect from_op="NearestNeighbors" from_port="model" to_port="model"/>
<portSpacing port="source_training" spacing="0"/>
<portSpacing port="sink_model" spacing="0"/>
<portSpacing port="sink_through 1" spacing="0"/>
</process>
<process expanded="true">
<operator activated="true" class="apply_model" compatibility="5.1.004" expanded="true" name="ModelApplier">
<list key="application_parameters"/>
</operator>
<operator activated="true" class="performance" compatibility="5.1.004" expanded="true" name="Performance"/>
<connect from_port="model" to_op="ModelApplier" to_port="model"/>
<connect from_port="test set" to_op="ModelApplier" to_port="unlabelled data"/>
<connect from_op="ModelApplier" from_port="labelled data" to_op="Performance" to_port="labelled data"/>
<connect from_op="Performance" from_port="performance" to_port="averagable 1"/>
<portSpacing port="source_model" spacing="0"/>
<portSpacing port="source_test set" spacing="0"/>
<portSpacing port="source_through 1" spacing="0"/>
<portSpacing port="sink_averagable 1" spacing="0"/>
<portSpacing port="sink_averagable 2" spacing="0"/>
</process>
</operator>
<connect from_port="in 1" to_op="XValidation" to_port="training"/>
<connect from_op="XValidation" from_port="averagable 1" to_port="averagable 1"/>
<portSpacing port="source_in 1" spacing="0"/>
<portSpacing port="source_in 2" spacing="0"/>
<portSpacing port="sink_averagable 1" spacing="0"/>
<portSpacing port="sink_averagable 2" spacing="0"/>
</process>
</operator>
<operator activated="true" class="log" compatibility="5.1.004" expanded="true" height="76" name="Log" width="90" x="313" y="75">
<list key="log">
<parameter key="performance" value="operator.Loop and Average.value.performance"/>
</list>
</operator>
<connect from_port="example set" to_op="Loop and Average" to_port="in 1"/>
<connect from_op="Loop and Average" from_port="averagable 1" to_op="Log" to_port="through 1"/>
<connect from_op="Log" from_port="through 1" to_port="performance"/>
<portSpacing port="source_example set" spacing="0"/>
<portSpacing port="source_through 1" spacing="0"/>
<portSpacing port="sink_performance" spacing="0"/>
</process>
</operator>
<connect from_op="Retrieve" from_port="output" to_op="PCAWeighting" to_port="example set"/>
<connect from_op="PCAWeighting" from_port="weights" to_op="WeightGuidedFeatureSelection" to_port="attribute weights in"/>
<connect from_op="PCAWeighting" from_port="example set" to_op="WeightGuidedFeatureSelection" to_port="example set in"/>
<connect from_op="WeightGuidedFeatureSelection" from_port="example set out" to_port="result 1"/>
<connect from_op="WeightGuidedFeatureSelection" from_port="weights" to_port="result 2"/>
<connect from_op="WeightGuidedFeatureSelection" from_port="performance" to_port="result 3"/>
<portSpacing port="source_input 1" spacing="0"/>
<portSpacing port="sink_result 1" spacing="0"/>
<portSpacing port="sink_result 2" spacing="0"/>
<portSpacing port="sink_result 3" spacing="0"/>
<portSpacing port="sink_result 4" spacing="0"/>
</process>
</operator>
</process>
