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

AP
AP Altair Community Member
in Community Q&A

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

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