Logistic Loss doesn't work

Kr4Bzzz

Hi!

I want to evaluate the prediction probabilities of a classifier via logistic loss.
My workflow is <Classifier> --> Apply Model --> Performance (Classification).

I choose logistic loss as main criterion, but whatever I do, I always get the following output:
logistic_loss: ∞

What am I doing wrong?

Nils_Woehler

Hi,

please post your process setup (like it is described here  http://rapid-i.com/rapidforum/index.php/topic,4654.0.html), so that we can see what you are doing right now and give you hints on how to improve it.

Best,
Nils

Kr4Bzzz

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.2.003">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="5.2.003" expanded="true" name="Process">
    <parameter key="parallelize_main_process" value="true"/>
    <process expanded="true" height="663" width="705">
      <operator activated="true" class="retrieve" compatibility="5.2.003" expanded="true" height="60" name="Retrieve" width="90" x="45" y="30">
        <parameter key="repository_entry" value="BioResponse_Train"/>
      </operator>
      <operator activated="true" class="set_role" compatibility="5.2.003" expanded="true" height="76" name="Set Role" width="90" x="180" y="30">
        <parameter key="name" value="Activity"/>
        <parameter key="target_role" value="label"/>
        <list key="set_additional_roles"/>
      </operator>
      <operator activated="true" class="support_vector_machine_libsvm" compatibility="5.2.003" expanded="true" height="76" name="SVM" width="90" x="315" y="30">
        <list key="class_weights"/>
        <parameter key="calculate_confidences" value="true"/>
      </operator>
      <operator activated="true" class="apply_model" compatibility="5.2.003" expanded="true" height="76" name="Apply Model" width="90" x="450" y="30">
        <list key="application_parameters"/>
      </operator>
      <operator activated="true" class="performance_classification" compatibility="5.2.003" expanded="true" height="76" name="Performance" width="90" x="585" y="30">
        <parameter key="main_criterion" value="logistic_loss"/>
        <parameter key="logistic_loss" value="true"/>
        <list key="class_weights"/>
      </operator>
      <connect from_op="Retrieve" from_port="output" to_op="Set Role" to_port="example set input"/>
      <connect from_op="Set Role" from_port="example set output" to_op="SVM" to_port="training set"/>
      <connect from_op="SVM" from_port="model" to_op="Apply Model" to_port="model"/>
      <connect from_op="SVM" from_port="exampleSet" to_op="Apply Model" to_port="unlabelled data"/>
      <connect from_op="Apply Model" from_port="labelled data" to_op="Performance" to_port="labelled data"/>
      <connect from_op="Performance" from_port="performance" to_port="result 1"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
      <portSpacing port="sink_result 2" spacing="0"/>
    </process>
  </operator>
</process>