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Merging data in two columns based on IF condition

jeganathanvelujeganathanvelu Member Posts: 17 Contributor II
edited November 2018 in Help
Hi,

I need help in replicating a functionality as in MS Excel.

I have two data Columns A and B. I want to combine them into column C on the condition IF value of A is empty then copy value of B in C

Could you please guide me on how to do this in Rapid Miner??

Thanks in Advance,
Jegan.

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    JEdwardJEdward RapidMiner Certified Analyst, RapidMiner Certified Expert, Member Posts: 578 Unicorn
    Here's an example using the Generate Attributes operator: 
    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
    <process version="5.3.015">
      <context>
        <input/>
        <output/>
        <macros/>
      </context>
      <operator activated="true" class="process" compatibility="5.3.015" expanded="true" name="Process">
        <process expanded="true">
          <operator activated="true" class="generate_data_user_specification" compatibility="5.3.015" expanded="true" height="60" name="Generate Data by User Specification" width="90" x="45" y="75">
            <list key="attribute_values">
              <parameter key="A" value="&quot;Jimmy&quot;"/>
              <parameter key="B" value="&quot;Stewart&quot;"/>
            </list>
            <list key="set_additional_roles"/>
          </operator>
          <operator activated="true" class="generate_attributes" compatibility="5.3.015" expanded="true" height="76" name="Generate Attributes" width="90" x="313" y="30">
            <list key="function_descriptions">
              <parameter key="C" value="if(missing(A),B,concat(A,B))"/>
            </list>
          </operator>
          <operator activated="true" class="generate_data_user_specification" compatibility="5.3.015" expanded="true" height="60" name="Generate Data by User Specification (2)" width="90" x="45" y="165">
            <list key="attribute_values">
              <parameter key="B" value="&quot;Stewart&quot;"/>
            </list>
            <list key="set_additional_roles"/>
          </operator>
          <operator activated="true" class="generate_empty_attribute" compatibility="5.3.015" expanded="true" height="76" name="Generate Empty Attribute" width="90" x="179" y="165">
            <parameter key="name" value="A"/>
            <parameter key="value_type" value="nominal"/>
          </operator>
          <operator activated="true" class="generate_attributes" compatibility="5.3.015" expanded="true" height="76" name="Generate Attributes (2)" width="90" x="380" y="165">
            <list key="function_descriptions">
              <parameter key="C" value="if(missing(A),B,concat(A,B))"/>
            </list>
          </operator>
          <connect from_op="Generate Data by User Specification" from_port="output" to_op="Generate Attributes" to_port="example set input"/>
          <connect from_op="Generate Attributes" from_port="example set output" to_port="result 1"/>
          <connect from_op="Generate Data by User Specification (2)" from_port="output" to_op="Generate Empty Attribute" to_port="example set input"/>
          <connect from_op="Generate Empty Attribute" from_port="example set output" to_op="Generate Attributes (2)" to_port="example set input"/>
          <connect from_op="Generate Attributes (2)" from_port="example set output" to_port="result 2"/>
          <portSpacing port="source_input 1" spacing="0"/>
          <portSpacing port="sink_result 1" spacing="0"/>
          <portSpacing port="sink_result 2" spacing="0"/>
          <portSpacing port="sink_result 3" spacing="0"/>
        </process>
      </operator>
    </process>
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    jeganathanvelujeganathanvelu Member Posts: 17 Contributor II
    Thanks JEdward it worked.
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