"Loop Subset Attributes: Feature Names"

MuehliMan

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

haddock

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