how to select attributes with sum equal to a specific number?

mansour

Dear All
I have a large dataset and I'd like to select just the attributes which sum of each attribute is equal to zero, or 1 or 2.
Any hint?
Regards 

MartinLiebig

Hi,

thats a fun one.

I would create myself a custom weights object using aggregate. Then you can use Select by weights to apply those weights as a filter. Attached is an example.

Best,

Martin

<?xml version="1.0" encoding="UTF-8"?><process version="9.7.002">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="9.7.002" expanded="true" name="Process">
    <parameter key="logverbosity" value="init"/>
    <parameter key="random_seed" value="2001"/>
    <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="9.7.002" expanded="true" height="68" name="Retrieve Sonar" width="90" x="45" y="136">
        <parameter key="repository_entry" value="//Samples/data/Sonar"/>
      </operator>
      <operator activated="true" class="multiply" compatibility="9.7.002" expanded="true" height="103" name="Multiply" width="90" x="179" y="136"/>
      <operator activated="true" class="aggregate" compatibility="9.7.002" expanded="true" height="82" name="Aggregate" width="90" x="313" y="34">
        <parameter key="use_default_aggregation" value="true"/>
        <parameter key="attribute_filter_type" value="all"/>
        <parameter key="attribute" value=""/>
        <parameter key="attributes" value=""/>
        <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="default_aggregation_function" value="sum"/>
        <list key="aggregation_attributes"/>
        <parameter key="group_by_attributes" value=""/>
        <parameter key="count_all_combinations" value="false"/>
        <parameter key="only_distinct" value="false"/>
        <parameter key="ignore_missings" value="true"/>
      </operator>
      <operator activated="true" class="rename_by_replacing" compatibility="9.7.002" expanded="true" height="82" name="Rename by Replacing" width="90" x="447" y="34">
        <parameter key="attribute_filter_type" value="all"/>
        <parameter key="attribute" value=""/>
        <parameter key="attributes" value=""/>
        <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="replace_what" value="sum\((.+)\)"/>
        <parameter key="replace_by" value="$1"/>
      </operator>
      <operator activated="true" class="transpose" compatibility="9.7.002" expanded="true" height="82" name="Transpose" width="90" x="581" y="34"/>
      <operator activated="true" class="converters:example_set_2_weights" compatibility="0.8.000-SNAPSHOT" expanded="true" height="82" name="ExampleSet to Weights" width="90" x="715" y="34">
        <parameter key="name_attribute" value="id"/>
        <parameter key="weights_attribute" value="att_1"/>
      </operator>
      <operator activated="true" class="select_by_weights" compatibility="9.7.002" expanded="true" height="103" name="Select by Weights" width="90" x="782" y="238">
        <parameter key="weight_relation" value="greater equals"/>
        <parameter key="weight" value="100.0"/>
        <parameter key="k" value="10"/>
        <parameter key="p" value="0.5"/>
        <parameter key="deselect_unknown" value="true"/>
        <parameter key="use_absolute_weights" value="true"/>
        <description align="center" color="transparent" colored="false" width="126">Only take attributes where the weight is &amp;gt; 100</description>
      </operator>
      <connect from_op="Retrieve Sonar" from_port="output" to_op="Multiply" to_port="input"/>
      <connect from_op="Multiply" from_port="output 1" to_op="Aggregate" to_port="example set input"/>
      <connect from_op="Multiply" from_port="output 2" to_op="Select by Weights" to_port="example set input"/>
      <connect from_op="Aggregate" from_port="example set output" to_op="Rename by Replacing" to_port="example set input"/>
      <connect from_op="Rename by Replacing" from_port="example set output" to_op="Transpose" to_port="example set input"/>
      <connect from_op="Transpose" from_port="example set output" to_op="ExampleSet to Weights" to_port="example set"/>
      <connect from_op="ExampleSet to Weights" from_port="weights" to_op="Select by Weights" to_port="weights"/>
      <connect from_op="Select by Weights" 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>