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"Loop Subset Attributes: Feature Names"

MuehliManMuehliMan Member Posts: 85 Maven
edited June 2019 in Help
Dear all,

I am working with the Loop Subset Operator to iteratively select exactly  2 attributes from my dataset and generate various new attributes based on these two, like atts1/atts2 or atts1*log(atts2). The thing is I would therefore need to address both attributes from a variable name.

If I only have one I can use Loop Attributes and set a variable name for that. But I would like to do this for two attributes. Is that possible?

Best regards,
Markus
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Answers

  • haddockhaddock Member Posts: 849 Maven
    Greets Markus,

    You could nest loops, but that would create duplicate pairs, so you'd need to loop through the inner subset, like this ... 
    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
    <process version="5.0">
      <context>
        <input/>
        <output/>
        <macros/>
      </context>
      <operator activated="true" class="process" compatibility="5.0.0" expanded="true" name="">
        <process expanded="true" height="365" width="547">
          <operator activated="true" class="generate_data" compatibility="5.0.8" expanded="true" height="60" name="Generate Data" width="90" x="180" y="30"/>
          <operator activated="true" class="loop_attributes" compatibility="5.0.8" expanded="true" height="60" name="Loop Attributes" width="90" x="447" y="75">
            <parameter key="iteration_macro" value="loop_attribute1"/>
            <process expanded="true" height="383" width="413">
              <operator activated="true" class="work_on_subset" compatibility="5.0.8" expanded="true" height="76" name="Work on Subset" width="90" x="112" y="30">
                <parameter key="attribute_filter_type" value="regular_expression"/>
                <parameter key="regular_expression" value="%{loop_attribute1}"/>
                <parameter key="invert_selection" value="true"/>
                <process expanded="true" height="383" width="926">
                  <operator activated="true" class="loop_attributes" compatibility="5.0.8" expanded="true" height="60" name="Loop Attributes (2)" width="90" x="246" y="28">
                    <parameter key="iteration_macro" value="loop_attribute2"/>
                    <process expanded="true" height="383" width="926">
                      <operator activated="true" class="set_macro" compatibility="5.0.8" expanded="true" height="76" name="Set Macro" width="90" x="161" y="20">
                        <parameter key="macro" value="combined"/>
                        <parameter key="value" value="%{loop_attribute1}/%{loop_attribute2}"/>
                      </operator>
                      <operator activated="true" class="provide_macro_as_log_value" compatibility="5.0.8" expanded="true" height="76" name="Provide Macro as Log Value" width="90" x="355" y="19">
                        <parameter key="macro_name" value="combined"/>
                      </operator>
                      <operator activated="true" class="log" compatibility="5.0.8" expanded="true" height="76" name="Log" width="90" x="537" y="17">
                        <list key="log">
                          <parameter key="atts" value="operator.Provide Macro as Log Value.value.macro_value"/>
                        </list>
                      </operator>
                      <connect from_port="example set" to_op="Set Macro" to_port="through 1"/>
                      <connect from_op="Set Macro" from_port="through 1" to_op="Provide Macro as Log Value" to_port="through 1"/>
                      <connect from_op="Provide Macro as Log Value" from_port="through 1" to_op="Log" to_port="through 1"/>
                      <connect from_op="Log" from_port="through 1" to_port="example set"/>
                      <portSpacing port="source_example set" spacing="0"/>
                      <portSpacing port="sink_example set" spacing="0"/>
                    </process>
                  </operator>
                  <connect from_port="exampleSet" to_op="Loop Attributes (2)" to_port="example set"/>
                  <connect from_op="Loop Attributes (2)" from_port="example set" to_port="example set"/>
                  <portSpacing port="source_exampleSet" spacing="0"/>
                  <portSpacing port="sink_example set" spacing="0"/>
                  <portSpacing port="sink_through 1" spacing="0"/>
                </process>
              </operator>
              <connect from_port="example set" to_op="Work on Subset" to_port="example set"/>
              <connect from_op="Work on Subset" from_port="example set" to_port="example set"/>
              <portSpacing port="source_example set" spacing="0"/>
              <portSpacing port="sink_example set" spacing="0"/>
            </process>
          </operator>
          <connect from_op="Generate Data" from_port="output" to_op="Loop Attributes" to_port="example set"/>
          <connect from_op="Loop Attributes" from_port="example set" 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>
    Or we can be a bit more fancy like this... 8) 

    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
    <process version="5.0">
      <context>
        <input/>
        <output/>
        <macros/>
      </context>
      <operator activated="true" class="process" compatibility="5.0.8" expanded="true" name="Process">
        <process expanded="true" height="383" width="908">
          <operator activated="true" class="generate_data" compatibility="5.0.8" expanded="true" height="60" name="Generate Data" width="90" x="77" y="86"/>
          <operator activated="true" class="generate_function_set" compatibility="5.0.8" expanded="true" height="76" name="Generate Function Set" width="90" x="332" y="83">
            <parameter key="use_diff" value="true"/>
          </operator>
          <operator activated="true" class="rename_by_constructions" compatibility="5.0.8" expanded="true" height="76" name="Rename by Constructions" width="90" x="486" y="81"/>
          <connect from_op="Generate Data" from_port="output" to_op="Generate Function Set" to_port="example set input"/>
          <connect from_op="Generate Function Set" from_port="example set output" to_op="Rename by Constructions" to_port="example set input"/>
          <connect from_op="Rename by Constructions" 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>
    I used this method to find functions in a myExperiment offering of that name. http://www.myexperiment.org/workflows/1321.html

    Have fun  ;D


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