Extract Information operator does ...not extract the information !

lionelderkrikorlionelderkrikor Moderator, RapidMiner Certified Analyst, Member Posts: 1,195 Unicorn
Hi all,

It's report a weird behaviour of the Extract Information operator of the Text Processing extension : 
I have a very simple dataset (Excel file in attached file): 


I want to extract in the two last lines : 
 - the action following the word "perform" ie "BLUETOOTH_CONTROL_S4" and "BLUETOOTH_SOURCE_S4" in a new attribute called "action"
 - the number in the brackets ie "2" in a new attribute called "number". 

As a results, I'm obtaining the following dataset (the "number" attribute is empty) : 


I precise that my regex in the Extract Information parameters is correct : 

In conclusion I have no problem with my first attribute "action", the information is correctly extracted.
I precise that I performed a test with Generate Extract operator (see the 2nd screenshot) and with this operator, the number "2" is correctly extracted...

How can we explain this behaviour ?

Regards,

Lionel

NB : the process : 
<?xml version="1.0" encoding="UTF-8"?><process version="9.2.000-SNAPSHOT">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="9.2.000-SNAPSHOT" 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="read_excel" compatibility="9.2.000-SNAPSHOT" expanded="true" height="68" name="Read Excel" width="90" x="45" y="187">
        <parameter key="excel_file" value="C:\Users\Lionel\Documents\Formations_DataScience\Rapidminer\Tests_Rapidminer\Log_extraction\log_extraction.xlsx"/>
        <parameter key="sheet_selection" value="sheet number"/>
        <parameter key="sheet_number" value="1"/>
        <parameter key="imported_cell_range" value="A1"/>
        <parameter key="encoding" value="SYSTEM"/>
        <parameter key="first_row_as_names" value="true"/>
        <list key="annotations"/>
        <parameter key="date_format" value=""/>
        <parameter key="time_zone" value="SYSTEM"/>
        <parameter key="locale" value="English (United States)"/>
        <parameter key="read_all_values_as_polynominal" value="false"/>
        <list key="data_set_meta_data_information">
          <parameter key="0" value="Att1.true.polynominal.attribute"/>
        </list>
        <parameter key="read_not_matching_values_as_missings" value="false"/>
        <parameter key="datamanagement" value="double_array"/>
        <parameter key="data_management" value="auto"/>
      </operator>
      <operator activated="true" class="filter_examples" compatibility="9.2.000-SNAPSHOT" expanded="true" height="103" name="Filter Examples" width="90" x="179" y="187">
        <parameter key="parameter_expression" value=""/>
        <parameter key="condition_class" value="custom_filters"/>
        <parameter key="invert_filter" value="false"/>
        <list key="filters_list">
          <parameter key="filters_entry_key" value="Att1.contains.Event"/>
        </list>
        <parameter key="filters_logic_and" value="true"/>
        <parameter key="filters_check_metadata" value="true"/>
      </operator>
      <operator activated="true" class="split" compatibility="9.2.000-SNAPSHOT" expanded="true" height="82" name="Split" width="90" x="313" y="187">
        <parameter key="attribute_filter_type" value="single"/>
        <parameter key="attribute" value="Att1"/>
        <parameter key="attributes" value=""/>
        <parameter key="use_except_expression" value="false"/>
        <parameter key="value_type" value="nominal"/>
        <parameter key="use_value_type_exception" value="false"/>
        <parameter key="except_value_type" value="file_path"/>
        <parameter key="block_type" value="single_value"/>
        <parameter key="use_block_type_exception" value="false"/>
        <parameter key="except_block_type" value="single_value"/>
        <parameter key="invert_selection" value="false"/>
        <parameter key="include_special_attributes" value="false"/>
        <parameter key="split_pattern" value="Event:"/>
        <parameter key="split_mode" value="ordered_split"/>
      </operator>
      <operator activated="true" class="nominal_to_text" compatibility="9.2.000-SNAPSHOT" expanded="true" height="82" name="Nominal to Text" width="90" x="447" y="187">
        <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="nominal"/>
        <parameter key="use_value_type_exception" value="false"/>
        <parameter key="except_value_type" value="file_path"/>
        <parameter key="block_type" value="single_value"/>
        <parameter key="use_block_type_exception" value="false"/>
        <parameter key="except_block_type" value="single_value"/>
        <parameter key="invert_selection" value="false"/>
        <parameter key="include_special_attributes" value="false"/>
      </operator>
      <operator activated="true" breakpoints="after" class="text:generate_extract" compatibility="8.1.000" expanded="true" height="68" name="Generate Extract" width="90" x="581" y="187">
        <parameter key="source_attribute" value="Att1_2"/>
        <parameter key="query_type" value="Regular Expression"/>
        <list key="string_machting_queries"/>
        <parameter key="attribute_type" value="Nominal"/>
        <list key="regular_expression_queries">
          <parameter key="number_generate_extract" value="\((.*?)\)"/>
        </list>
        <list key="regular_region_queries"/>
        <list key="xpath_queries"/>
        <list key="namespaces"/>
        <parameter key="ignore_CDATA" value="true"/>
        <parameter key="assume_html" value="true"/>
        <list key="index_queries"/>
        <list key="jsonpath_queries"/>
      </operator>
      <operator activated="true" class="text:process_document_from_data" compatibility="8.1.000" expanded="true" height="82" name="Process Documents from Data" width="90" x="782" y="187">
        <parameter key="create_word_vector" value="true"/>
        <parameter key="vector_creation" value="Term Occurrences"/>
        <parameter key="add_meta_information" value="true"/>
        <parameter key="keep_text" value="false"/>
        <parameter key="prune_method" value="none"/>
        <parameter key="prune_below_percent" value="3.0"/>
        <parameter key="prune_above_percent" value="30.0"/>
        <parameter key="prune_below_rank" value="0.05"/>
        <parameter key="prune_above_rank" value="0.95"/>
        <parameter key="datamanagement" value="double_sparse_array"/>
        <parameter key="data_management" value="auto"/>
        <parameter key="select_attributes_and_weights" value="false"/>
        <list key="specify_weights"/>
        <process expanded="true">
          <operator activated="false" class="text:extract_information" compatibility="8.1.000" expanded="true" height="68" name="Extract Information (2)" width="90" x="246" y="238">
            <parameter key="query_type" value="Regular Expression"/>
            <list key="string_machting_queries"/>
            <parameter key="attribute_type" value="Numerical"/>
            <list key="regular_expression_queries">
              <parameter key="number" value="\((.*?)\)"/>
            </list>
            <list key="regular_region_queries"/>
            <list key="xpath_queries"/>
            <list key="namespaces"/>
            <parameter key="ignore_CDATA" value="true"/>
            <parameter key="assume_html" value="true"/>
            <list key="index_queries"/>
            <list key="jsonpath_queries"/>
          </operator>
          <operator activated="true" class="text:extract_information" compatibility="8.1.000" expanded="true" height="68" name="Extract Information" width="90" x="179" y="34">
            <parameter key="query_type" value="Regular Expression"/>
            <list key="string_machting_queries"/>
            <parameter key="attribute_type" value="Nominal"/>
            <list key="regular_expression_queries">
              <parameter key="number" value="\((.*?)\)"/>
              <parameter key="action" value="(?&lt;=perform)(.*)(?==&gt;)"/>
            </list>
            <list key="regular_region_queries"/>
            <list key="xpath_queries"/>
            <list key="namespaces"/>
            <parameter key="ignore_CDATA" value="true"/>
            <parameter key="assume_html" value="true"/>
            <list key="index_queries"/>
            <list key="jsonpath_queries"/>
          </operator>
          <connect from_port="document" to_op="Extract Information" to_port="document"/>
          <connect from_op="Extract Information" from_port="document" to_port="document 1"/>
          <portSpacing port="source_document" spacing="0"/>
          <portSpacing port="sink_document 1" spacing="0"/>
          <portSpacing port="sink_document 2" spacing="0"/>
        </process>
      </operator>
      <connect from_op="Read Excel" from_port="output" to_op="Filter Examples" to_port="example set input"/>
      <connect from_op="Filter Examples" from_port="example set output" to_op="Split" to_port="example set input"/>
      <connect from_op="Split" from_port="example set output" to_op="Nominal to Text" to_port="example set input"/>
      <connect from_op="Nominal to Text" from_port="example set output" to_op="Generate Extract" to_port="Example Set"/>
      <connect from_op="Generate Extract" from_port="Example Set" to_op="Process Documents from Data" to_port="example set"/>
      <connect from_op="Process Documents from Data" 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>



 

Best Answer

  • gmeiergmeier Employee, Member Posts: 25 RM Engineering
    Solution Accepted
    Hi Lionel,
    the problem seems to be that the whole line
    controller -- Device::UIProfiler::_handleEvent() for _UI-PROFILER_:   1262488101.460: perform  BLUETOOTH_CONTROL_S4 => connectDevice: xx:xx:xx:xx:xx:xx (2)
    is considered for the regex and the first matching is the () from handleEvent(). If you add a Replace operator with replace what = \(\)  and replace by = _  before Process Documents then the 2 is extracted. In the Generate Extract operator the handleEvent() is not present because the attribute Att1_2 is specified.


Answers

  • MaerkliMaerkli Member Posts: 84 Guru
    If Lionel cries for help, it should be damned complicated.
    Bonne chance, Lionel!
    Maerkli
  • MaerkliMaerkli Member Posts: 84 Guru
    Hallo Lionel,
    If I understand correctly, the query expression \((.*?)\) must produce 2 as result. I have replaced by \((.*?)\)S or \((.*?)\)W and I get ? under number in the tableau. Regex is not the issue. If you find the issue, is it possible to share with us?
    Merci,
    Maerkli






  • lionelderkrikorlionelderkrikor Moderator, RapidMiner Certified Analyst, Member Posts: 1,195 Unicorn
    Hi @gmeier,

    OK, that's totally logic ! I understand.
    Thanks you for your explanations.

    Regards,

    Lionel


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