"Filtering attributes by logical expressions"

vme64

Hello,

  I'd like to filter examples based on a logical condition, for example that attribute B is bigger than attribute A. I cannot do this with FilterExamples. Is there another operator that I am missing? Follows an example code.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.1.009">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="5.1.009" expanded="true" name="Process">
    <process expanded="true" height="351" width="874">
      <operator activated="true" class="generate_data_user_specification" compatibility="5.1.009" expanded="true" height="60" name="Generate Data by User Specification" width="90" x="45" y="30">
        <list key="attribute_values">
          <parameter key="a" value="1"/>
          <parameter key="b" value="2"/>
        </list>
        <list key="set_additional_roles"/>
      </operator>
      <operator activated="true" class="filter_examples" compatibility="5.1.009" expanded="true" height="76" name="Filter Examples" width="90" x="179" y="30">
        <parameter key="condition_class" value="attribute_value_filter"/>
        <parameter key="parameter_string" value="b &gt; a"/>
      </operator>
      <connect from_op="Generate Data by User Specification" from_port="output" to_op="Filter Examples" to_port="example set input"/>
      <connect from_op="Filter Examples" from_port="example set output" 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"/>

Best regards,

  Vinicius

Marco_Boeck

Hi,

you can do that by adding a Generate Attribute step:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.1.013">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="5.1.013" expanded="true" name="Process">
    <process expanded="true" height="351" width="874">
      <operator activated="true" class="generate_data_user_specification" compatibility="5.1.013" expanded="true" height="60" name="Generate Data by User Specification" width="90" x="45" y="30">
        <list key="attribute_values">
          <parameter key="a" value="1"/>
          <parameter key="b" value="2"/>
        </list>
        <list key="set_additional_roles"/>
      </operator>
      <operator activated="true" class="generate_attributes" compatibility="5.1.013" expanded="true" height="76" name="Generate Attributes" width="90" x="179" y="30">
        <list key="function_descriptions">
          <parameter key="toRemove" value="if(a&lt;b, true, false)"/>
        </list>
      </operator>
      <operator activated="true" class="filter_examples" compatibility="5.1.013" expanded="true" height="76" name="Filter Examples" width="90" x="313" y="30">
        <parameter key="condition_class" value="attribute_value_filter"/>
        <parameter key="parameter_string" value="toRemove != true"/>
      </operator>
      <operator activated="true" class="select_attributes" compatibility="5.1.013" expanded="true" height="76" name="Select Attributes" width="90" x="447" y="30">
        <parameter key="attribute_filter_type" value="single"/>
        <parameter key="attribute" value="toRemove"/>
        <parameter key="invert_selection" value="true"/>
      </operator>
      <connect from_op="Generate Data by User Specification" from_port="output" to_op="Generate Attributes" to_port="example set input"/>
      <connect from_op="Generate Attributes" from_port="example set output" to_op="Filter Examples" to_port="example set input"/>
      <connect from_op="Filter Examples" from_port="example set output" to_op="Select Attributes" to_port="example set input"/>
      <connect from_op="Select Attributes" from_port="example set output" 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>

Regards,
Marco

vme64

Thanks for the answer! I was just wondering if there was something more direct... Anyway, it works.

Best regards,

  Vinicius