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"Generate attribute if clause"

User: "MuehliMan"
MuehliMan
New Altair Community Member
Updated by Jocelyn
Hello again,

I have troubles getting an operator to work:
<operator activated="true" class="generate_attributes" compatibility="5.0.0" expanded="true" height="76" name="Generate Attributes (27)" width="90" x="179" y="435">
            <list key="function_descriptions">
              <parameter key="PT" value="if( PT_old=NaN , PT_add , PT_old )"/>
            </list>
            <parameter key="keep_all" value="true"/>
          </operator>
I want to add the values from the attributes "PT_old" and "PT_add" to the new column PT.

Thanks in advance,
Markus



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    User: "haddock"
    haddock
    New Altair Community Member
    Hi there,

    Unfortunately the formula parser does not recognise NaN, so you have to fool it if you can! With numbers this seems to work.. 
    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
    <process version="5.0">
      <context>
        <input/>
        <output/>
        <macros/>
      </context>
      <operator activated="true" class="process" expanded="true" name="Process">
        <process expanded="true" height="161" width="681">
          <operator activated="true" class="retrieve" expanded="true" height="60" name="Retrieve" width="90" x="113" y="63">
            <parameter key="repository_entry" value="//Samples/data/Labor-Negotiations"/>
          </operator>
          <operator activated="true" class="generate_attributes" expanded="true" height="76" name="Generate Attributes" width="90" x="313" y="75">
            <list key="function_descriptions">
              <parameter key="Numbers" value="if(duration*duration&gt;-1,5,8)"/>
            </list>
          </operator>
          <connect from_op="Retrieve" 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"/>
          <portSpacing port="source_input 1" spacing="0"/>
          <portSpacing port="sink_result 1" spacing="0"/>
          <portSpacing port="sink_result 2" spacing="0"/>
        </process>
      </operator>
    </process>
    Not quite sure what you'd do for nominals, but you get the idea..

    User: "cherokee"
    cherokee
    New Altair Community Member
    Hi!

    Just a small remark! Even in Java NaN==NaN is allways false.

    It's feature not a bug!  ;)

    Best regards,
    chero
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