How to replace specific data points

YESYES Member Posts: 1 Newbie
Lets say we have the following data set 
Attribute: Age, Gender, Floor 
 Row 1.    11     Male      20
 Row 2     11     Female  29
 Row 3     13     Male      18
 Row 4     12     Male.     17

 How do we change only the age of row 2 from 11 to 12 without changing the age value of row 1 from 11 to 12? Thank You

Answers

  • ClaudioKeckClaudioKeck Employee, Member Posts: 35 Guru
    edited January 30
    Hi, 

    see this exmaple workflow below how this could be done. you could either use the "Map" (Numerical) or "Replace" (Nominal) Operator or the Data Editor. 

    <?xml version="1.0" encoding="UTF-8"?><process version="10.3.001">
    
    <context>
    <input/>
    <output/>
    <macros/>
    </context>
    <operator activated="true" class="process" compatibility="10.3.001" 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="utility:create_exampleset" compatibility="10.3.001" expanded="true" height="68" name="Create ExampleSet" width="90" x="179" y="136">
    <parameter key="generator_type" value="comma separated text"/>
    <parameter key="number_of_examples" value="100"/>
    <parameter key="use_stepsize" value="false"/>
    <list key="function_descriptions"/>
    <parameter key="add_id_attribute" value="false"/>
    <list key="numeric_series_configuration"/>
    <list key="date_series_configuration"/>
    <list key="date_series_configuration (interval)"/>
    <parameter key="date_format" value="yyyy-MM-dd HH:mm:ss"/>
    <parameter key="time_zone" value="SYSTEM"/>
    <parameter key="input_csv_text" value="Age,GEnder,Floor&#10;11,Male,20&#10;11,Female,29&#10;13,Male,18&#10;12,Male,17"/>
    <parameter key="column_separator" value=","/>
    <parameter key="parse_all_as_nominal" value="false"/>
    <parameter key="decimal_point_character" value="."/>
    <parameter key="trim_attribute_names" value="true"/>
    </operator>
    <operator activated="true" class="blending:generate_id" compatibility="10.3.001" expanded="true" height="82" name="Generate ID" width="90" x="313" y="136">
    <parameter key="create_nominal_ids" value="false"/>
    <parameter key="offset" value="0"/>
    </operator>
    <operator activated="true" class="filter_examples" compatibility="10.3.001" expanded="true" height="103" name="Filter Examples" width="90" x="447" 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="id.eq.2"/>
    </list>
    <parameter key="filters_logic_and" value="true"/>
    <parameter key="filters_check_metadata" value="true"/>
    </operator>
    <operator activated="true" class="map" compatibility="10.3.001" expanded="true" height="82" name="Map" width="90" x="581" y="136">
    <parameter key="attribute_filter_type" value="single"/>
    <parameter key="attribute" value="Age"/>
    <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"/>
    <list key="value_mappings"/>
    <parameter key="replace_what" value="11"/>
    <parameter key="replace_by" value="12"/>
    <parameter key="consider_regular_expressions" value="false"/>
    <parameter key="add_default_mapping" value="false"/>
    </operator>
    <operator activated="true" class="append" compatibility="10.3.001" expanded="true" height="103" name="Append" width="90" x="715" y="136">
    <parameter key="datamanagement" value="double_array"/>
    <parameter key="data_management" value="auto"/>
    <parameter key="merge_type" value="all"/>
    </operator>
    <operator activated="true" class="blending:sort" compatibility="10.3.001" expanded="true" height="82" name="Sort" width="90" x="849" y="136">
    <list key="sort_by">
    <parameter key="id" value="ascending"/>
    </list>
    </operator>
    <connect from_op="Create ExampleSet" from_port="output" to_op="Generate ID" to_port="example set input"/>
    <connect from_op="Generate ID" from_port="example set output" to_op="Filter Examples" to_port="example set input"/>
    <connect from_op="Filter Examples" from_port="example set output" to_op="Map" to_port="example set input"/>
    <connect from_op="Filter Examples" from_port="unmatched example set" to_op="Append" to_port="example set 2"/>
    <connect from_op="Map" from_port="example set output" to_op="Append" to_port="example set 1"/>
    <connect from_op="Append" from_port="merged set" to_op="Sort" to_port="example set input"/>
    <connect from_op="Sort" 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>
    rjones13
  • MartinLiebigMartinLiebig Administrator, Moderator, Employee, RapidMiner Certified Analyst, RapidMiner Certified Expert, University Professor Posts: 3,483 RM Data Scientist
    edited January 31
    Another option can be the Set Data operator, which sets the value of an individual cell.

    BR,
    Martin
    - Sr. Director Data Solutions, Altair RapidMiner -
    Dortmund, Germany
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