exploratry data analysis on data using chi-square test

vishaldutt53
vishaldutt53 New Altair Community Member
edited November 2024 in Community Q&A

 i m getting trouble to find the chi squar test on the dataset. my dataset has real or polynomial values.

here is xml process.

<?xml version="1.0" encoding="UTF-8"?><process version="8.1.001">
  <operator activated="true" class="retrieve" compatibility="8.1.001" expanded="true" height="68" name="Retrieve house_prices" width="90" x="45" y="34">
    <parameter key="repository_entry" value="//Local Repository/house_prices"/>
  </operator>
</process>
<?xml version="1.0" encoding="UTF-8"?><process version="8.1.001">
  <operator activated="true" class="weka:W-ChiSquaredAttributeEval" compatibility="7.3.000" expanded="true" height="82" name="W-ChiSquaredAttributeEval" width="90" x="313" y="34">
    <parameter key="normalize_weights" value="false"/>
    <parameter key="sort_weights" value="true"/>
    <parameter key="sort_direction" value="ascending"/>
    <parameter key="M" value="false"/>
    <parameter key="B" value="false"/>
  </operator>
</process>

can anyone help me please?

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Answers

  • YYH
    YYH
    Altair Employee

    You can apply the feature weight by chi-squared test like this

    <?xml version="1.0" encoding="UTF-8"?><process version="8.1.001">
      <operator activated="true" class="retrieve" compatibility="8.1.001" expanded="true" height="68" name="Retrieve Titanic Training" width="90" x="112" y="34">
        <parameter key="repository_entry" value="//Samples/data/Titanic Training"/>
      </operator>
    </process>
    <?xml version="1.0" encoding="UTF-8"?><process version="8.1.001">
      <operator activated="true" class="weka:W-ChiSquaredAttributeEval" compatibility="7.3.000" expanded="true" height="82" name="W-ChiSquaredAttributeEval" width="90" x="313" y="34">
        <parameter key="normalize_weights" value="false"/>
        <parameter key="sort_weights" value="true"/>
        <parameter key="sort_direction" value="ascending"/>
        <parameter key="M" value="false"/>
        <parameter key="B" value="false"/>
      </operator>
    </process>
    <?xml version="1.0" encoding="UTF-8"?><process version="8.1.001">
      <operator activated="true" class="weight_by_chi_squared_statistic" compatibility="8.1.001" expanded="true" height="82" name="Weight by Chi Squared Statistic" width="90" x="514" y="136">
        <parameter key="normalize_weights" value="false"/>
        <parameter key="sort_weights" value="true"/>
        <parameter key="sort_direction" value="ascending"/>
        <parameter key="number_of_bins" value="10"/>
      </operator>
    </process>
  • Telcontar120
    Telcontar120 New Altair Community Member

    You can also check out the Statistics extension in the marketplace, which has a more generalized approach to calculating the chi-square statistics.

     

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