Merging data in two columns based on IF condition

jeganathanvelu

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.

JEdward

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>

jeganathanvelu

Thanks JEdward it worked.