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In Titanic dataset, i have a dataset containing Categorical features (such as Cabin, Embark and Sex).

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I need to build a linear or polynomial model with multiple variables to predict Survive. I wish to consider Categorical features as well. Let's say, i can replace all categorical values with a respected numerical value. For example about Sex column, I can replace: 1 with male and 2 with female

My question is:

Is it useful to consider a categorical features into a polynomial or linear model?

Jimmy
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