Using Regex and Macros in Loop Attributes

RapidMinerUser12

Hi,

I'm creating a reusable template for looping through attributes. So, I specify the name of the attribute in a separate macro. How can I use this macro in the regex field of Loop Attributes if I'm using attribute filter type = regular expression?

BalazsBarany

Hi,

I hope I'm not missing anything, but you can simply enter %{macroname} in the regular expression input field and it is being used in my test process.

<?xml version="1.0" encoding="UTF-8"?><process version="9.4.001">
  <context>
    <input/>
    <output/>
    <macros>
      <macro>
        <key>attfilter</key>
        <value>attribute_.3</value>
      </macro>
    </macros>
  </context>
  <operator activated="true" class="process" compatibility="9.4.001" expanded="true" name="Process">
    <parameter key="logverbosity" value="init"/>
    <parameter key="random_seed" value="-1"/>
    <parameter key="send_mail" value="never"/>
    <parameter key="notification_email" value=""/>
    <parameter key="process_duration_for_mail" value="30"/>
    <parameter key="encoding" value="SYSTEM"/>
    <process expanded="true">
      <operator activated="true" class="retrieve" compatibility="9.4.001" expanded="true" height="68" name="Retrieve Sonar" width="90" x="112" y="34">
        <parameter key="repository_entry" value="//Samples/data/Sonar"/>
      </operator>
      <operator activated="true" class="concurrency:loop_attributes" compatibility="9.4.001" expanded="true" height="82" name="Loop Attributes" width="90" x="313" y="34">
        <parameter key="attribute_filter_type" value="regular_expression"/>
        <parameter key="attribute" value=""/>
        <parameter key="attributes" value=""/>
        <parameter key="regular_expression" value="%{attfilter}"/>
        <parameter key="use_except_expression" value="false"/>
        <parameter key="value_type" value="attribute_value"/>
        <parameter key="use_value_type_exception" value="false"/>
        <parameter key="except_value_type" value="time"/>
        <parameter key="block_type" value="attribute_block"/>
        <parameter key="use_block_type_exception" value="false"/>
        <parameter key="except_block_type" value="value_matrix_row_start"/>
        <parameter key="invert_selection" value="false"/>
        <parameter key="include_special_attributes" value="false"/>
        <parameter key="attribute_name_macro" value="loop_attribute"/>
        <parameter key="reuse_results" value="false"/>
        <parameter key="enable_parallel_execution" value="true"/>
        <process expanded="true">
          <portSpacing port="source_input 1" spacing="0"/>
          <portSpacing port="source_input 2" spacing="0"/>
          <portSpacing port="sink_output 1" spacing="0"/>
          <portSpacing port="sink_output 2" spacing="0"/>
        </process>
      </operator>
      <connect from_op="Retrieve Sonar" from_port="output" to_op="Loop Attributes" to_port="input 1"/>
      <connect from_op="Loop Attributes" from_port="output 1" 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>

Example process. Look at the macros after execution.

If that doesn't work, you could try "Set Parameters from ExampleSet" in the Operator Toolbox extension.

Regards,

Balázs

BalazsBarany

Hi,

OK, so it works in the normal parameter but doesn't in the RE test window.

Good to know.

Regards,
Balázs

RapidMinerUser12

Hi,

Thanks for taking the time to answer this question.

The problem is, that when I try to input a regex, it doesn't let me just use a macro in the regex in the pop-up window. But if I input the macro in the field without opening the pop-up window, then I can use it normally.

Thanks.