why the value of outlook in correlation matrix is “?”

AP
AP Altair Community Member

just run this

image.png

 you will get this

image.png

why the value of outlook in correlation matrix is “?”

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Answers

  • RolandJones
    RolandJones
    Altair Employee

    Hi @AP,

    This is because the value can only be calculated when the attributes are numerical or binominal. Outlook is Nominal, and hence a correlation can't be calculated.

    Thanks,

    Roland

  • AP
    AP Altair Community Member

    “the value can only be calculated when the attributes are numerical or binominal. Outlook is Nominal, and hence a correlation can't be calculated.”—-why?

  • RolandJones
    RolandJones
    Altair Employee

    The statistical method of calculating correlations doesn't support categories, referred to as nominal in AI Studio.

    Hope this helps,

    Thanks,

    Roland

  • AP
    AP Altair Community Member

    “The statistical method of calculating correlations doesn't support categories”,but “binominal” is a kind of categories