"Macro to calulate % of a value"

Hi Anki,

if you already have the value extracted as a macro, you can generate a new one using expressions via "Generate Macro". Here a small example illustrating this.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.1.008">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="5.1.008" expanded="true" name="Process">
    <process expanded="true" height="145" width="681">
      <operator activated="true" class="generate_data" compatibility="5.1.008" expanded="true" height="60" name="Generate Data" width="90" x="45" y="30">
        <parameter key="number_examples" value="1"/>
        <parameter key="number_of_attributes" value="1"/>
      </operator>
      <operator activated="true" class="select_attributes" compatibility="5.1.008" expanded="true" height="76" name="Select Attributes" width="90" x="179" y="30">
        <parameter key="attribute_filter_type" value="single"/>
        <parameter key="attribute" value="label"/>
        <parameter key="invert_selection" value="true"/>
        <parameter key="include_special_attributes" value="true"/>
      </operator>
      <operator activated="true" class="extract_macro" compatibility="5.1.008" expanded="true" height="60" name="Extract Macro" width="90" x="313" y="30">
        <parameter key="macro" value="tran_count"/>
        <parameter key="macro_type" value="data_value"/>
        <parameter key="attribute_name" value="att1"/>
        <parameter key="example_index" value="1"/>
      </operator>
      <operator activated="true" class="generate_macro" compatibility="5.1.008" expanded="true" height="76" name="Generate Macro" width="90" x="447" y="30">
        <list key="function_descriptions">
          <parameter key="outlier_threshold" value="%{tran_count} * 0.2"/>
        </list>
      </operator>
      <operator activated="true" class="generate_attributes" compatibility="5.1.008" expanded="true" height="76" name="Generate Attributes" width="90" x="581" y="30">
        <list key="function_descriptions">
          <parameter key="threshold_test" value="%{outlier_threshold}"/>
        </list>
      </operator>
      <connect from_op="Generate Data" from_port="output" to_op="Select Attributes" to_port="example set input"/>
      <connect from_op="Select Attributes" from_port="example set output" to_op="Extract Macro" to_port="example set"/>
      <connect from_op="Extract Macro" from_port="example set" to_op="Generate Macro" to_port="through 1"/>
      <connect from_op="Generate Macro" from_port="through 1" to_op="Generate Attributes" to_port="example set input"/>
      <connect from_op="Generate 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>

"Generate Attributes" is just used to show the computed macro value. Instead of generating output this way, you will have to use the new macro as input parameter for "Outlier Analysis". You will certainly need integer values, so you can wrap the "Generate Macro" expression included above inside the ceil() or floor() function, e.g. ceil(%{tran_count} * 0.2)

Best regards
Matthias

Hi Matthias

Thanks a lot.

Yours
Anki