Loosing my ID field when using Principal Component Generator

Keithr

Hi,

I'm using the pricipal component generator to combine some highly correlated variables in a classification problem, which works fine, but it's dropping the ID I have so there is no way to tie the classification result back to the actual customer ID.

The process I'm using is as follows:
ExampleSource (label, ID, 82 variables) -> AttributeFilter (label, ID, 3 variables) -> principalComponentGenerator (label, 1 variable).

What am I doing wrong?

Thanks in advance for your help.

Keith

land

Hi Keith,
you probably forgot to set the ID attribute as special attribute. Every not special attributes are used within PCA and removed afterwards. You might define the ID attribute at the operator loading the data, if it provids an parameter "id_attribute" otherwise you can change the type lateron by using the ChangeAttributeRole operator:

    <operator name="ChangeAttributeRole" class="ChangeAttributeRole">
        <parameter key="name"	value="ID"/>
        <parameter key="target_role"	value="id"/>
    </operator>

Greetings,
  Sebastian