Compute rank within subgroups

Hi Keith,

not a single operator but you could use a combination of several operators (I am talking about the upcoming release 4.3 here):

- value iterator to iterate over the groups
- example filter to filter out only the current group
- sorting to build the rank
- id taggin to give numbers for the ranks
- io retriever to retrieve last result
- example set merge to merge the current group ranking with the last one (retrieved)
- io storer to store the current result again in the store

It's will be a nice process for such a "simple" task 

Cheers,
Ingo

Hello,

I 've got exactly the same problem like Keith.

Is there meanwhile any simpler solution to solve this?

If not: Would you mind to post an example process with the described solution?

Thanks a lot,
Jan

Well, now it's doable with only 5 operators oO

Here you go!

Best regards, Marius

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.3.000">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="5.3.000" expanded="true" name="Process">
    <process expanded="true" height="549" width="701">
      <operator activated="true" class="subprocess" compatibility="5.3.000" expanded="true" height="76" name="Generate Data (3)" width="90" x="45" y="30">
        <process expanded="true" height="531" width="550">
          <operator activated="true" class="generate_data" compatibility="5.3.000" expanded="true" height="60" name="Generate Data" width="90" x="45" y="30">
            <parameter key="number_examples" value="5"/>
            <parameter key="number_of_attributes" value="1"/>
          </operator>
          <operator activated="true" class="generate_attributes" compatibility="5.3.000" expanded="true" height="76" name="Generate Attributes" width="90" x="179" y="30">
            <list key="function_descriptions">
              <parameter key="grp" value="&quot;1&quot;"/>
            </list>
          </operator>
          <operator activated="true" class="generate_data" compatibility="5.3.000" expanded="true" height="60" name="Generate Data (2)" width="90" x="45" y="120">
            <parameter key="number_examples" value="4"/>
            <parameter key="number_of_attributes" value="1"/>
          </operator>
          <operator activated="true" class="generate_attributes" compatibility="5.3.000" expanded="true" height="76" name="Generate Attributes (2)" width="90" x="179" y="120">
            <list key="function_descriptions">
              <parameter key="grp" value="&quot;2&quot;"/>
            </list>
          </operator>
          <operator activated="true" class="append" compatibility="5.3.000" expanded="true" height="94" name="Append" width="90" x="313" y="75"/>
          <connect from_op="Generate Data" from_port="output" to_op="Generate Attributes" to_port="example set input"/>
          <connect from_op="Generate Attributes" from_port="example set output" to_op="Append" to_port="example set 1"/>
          <connect from_op="Generate Data (2)" from_port="output" to_op="Generate Attributes (2)" to_port="example set input"/>
          <connect from_op="Generate Attributes (2)" from_port="example set output" to_op="Append" to_port="example set 2"/>
          <connect from_op="Append" from_port="merged set" to_port="out 1"/>
          <portSpacing port="source_in 1" spacing="0"/>
          <portSpacing port="sink_out 1" spacing="0"/>
          <portSpacing port="sink_out 2" spacing="0"/>
        </process>
      </operator>
      <operator activated="true" class="loop_values" compatibility="5.3.000" expanded="true" height="76" name="Loop Values" width="90" x="179" y="30">
        <parameter key="attribute" value="grp"/>
        <parameter key="iteration_macro" value="grp"/>
        <process expanded="true" height="549" width="433">
          <operator activated="true" class="filter_examples" compatibility="5.3.000" expanded="true" height="76" name="Filter Examples" width="90" x="45" y="30">
            <parameter key="condition_class" value="attribute_value_filter"/>
            <parameter key="parameter_string" value="grp=%{grp}"/>
          </operator>
          <operator activated="true" class="sort" compatibility="5.3.000" expanded="true" height="76" name="Sort" width="90" x="179" y="30">
            <parameter key="attribute_name" value="att1"/>
          </operator>
          <operator activated="true" class="generate_id" compatibility="5.3.000" expanded="true" height="76" name="Generate ID" width="90" x="313" y="30"/>
          <connect from_port="example set" to_op="Filter Examples" to_port="example set input"/>
          <connect from_op="Filter Examples" from_port="example set output" to_op="Sort" to_port="example set input"/>
          <connect from_op="Sort" from_port="example set output" to_op="Generate ID" to_port="example set input"/>
          <connect from_op="Generate ID" from_port="example set output" to_port="out 1"/>
          <portSpacing port="source_example set" spacing="0"/>
          <portSpacing port="sink_out 1" spacing="0"/>
          <portSpacing port="sink_out 2" spacing="0"/>
        </process>
      </operator>
      <operator activated="true" class="append" compatibility="5.3.000" expanded="true" height="76" name="Append (2)" width="90" x="313" y="30"/>
      <connect from_op="Generate Data (3)" from_port="out 1" to_op="Loop Values" to_port="example set"/>
      <connect from_op="Loop Values" from_port="out 1" to_op="Append (2)" to_port="example set 1"/>
      <connect from_op="Append (2)" from_port="merged 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>