"Nested macro"

CharlieFirpo

Dear all!

It is possible to use macro(macro("name_of_macro")) to get a value, so nested macros work. But what if an operator does not support RapidMiner functions like 'macro()'. One should use the formula: '%{name_of_macro}'. But in that form, does nested macros work? Like: %{%{name_of_macro}}. How can I get a value in that way?

Thank you!

MariusHelf

D'oh, that's good ol' C pointers to pointers... In RapidMiner you need to create yet another macro with Generate Macro, which can then be used in any desired field. See attached process.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.3.013">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="5.3.013" expanded="true" name="Process">
    <process expanded="true">
      <operator activated="true" class="set_macro" compatibility="5.3.013" expanded="true" height="76" name="Set Macro" width="90" x="45" y="30">
        <parameter key="macro" value="a"/>
        <parameter key="value" value="value"/>
      </operator>
      <operator activated="true" class="set_macro" compatibility="5.3.013" expanded="true" height="76" name="Set Macro (2)" width="90" x="179" y="30">
        <parameter key="macro" value="b"/>
        <parameter key="value" value="a"/>
      </operator>
      <operator activated="true" class="generate_macro" compatibility="5.3.013" expanded="true" height="76" name="Generate Macro" width="90" x="447" y="30">
        <list key="function_descriptions">
          <parameter key="desiredOutput" value="macro(macro(&quot;b&quot;))"/>
        </list>
      </operator>
      <operator activated="true" class="print_to_console" compatibility="5.3.013" expanded="true" height="76" name="Print to Console" width="90" x="581" y="30">
        <parameter key="log_value" value="%{desiredOutput}"/>
      </operator>
      <connect from_op="Set Macro" from_port="through 1" to_op="Set Macro (2)" to_port="through 1"/>
      <connect from_op="Set Macro (2)" from_port="through 1" to_op="Generate Macro" to_port="through 1"/>
      <connect from_op="Generate Macro" from_port="through 1" to_op="Print to Console" to_port="through 1"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
    </process>
  </operator>
</process>