Multinomial Models for Nominal Data

Multinomial Models for Nominal Data

Multinomial Models for Nominal Data. Take a second look at your response variables before the multinomial modeling. The popular multinomial logistic regression is known as an extension of the binomial logistic regression model, in order to deal with more than two possible discrete outcomes.

The popular multinomial logistic regression is known as an extension of the binomial logistic regression model, in order to deal with more than two possible discrete outcomes.However, the multinomial logistic regression is not designed to be a general multi-class classifier but designed specifically for the nominal multinomial data.To note, nominal data and ordinal data are two major categories of multinomial data. The difference is that there is no order to the categories in nominal multinomial data while there is an order to those in ordinal multinomial data.For example, if our goal is to distinguish the three classes of plants in the IRIS dataset, we need to treat the plant categories as a nominal outcome because there is no specific order in the classes of plants. However, if we want to predict the score at the end of the first half in an NBA final into three categories, “winning”, “losing”, or “tie”, we need to regard it as an ordinal outcome because the pairwise distances are not the same among the three classes.

regression data-science multinomial r logistic-regression

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