Correlation between polynominal attributes?

rapid1234

Hi, I work with the employee attrition data set and have a question. The data set contains numerical values, bionominal and polynomial values. With the nummerical and bionominal values, I can use the operator correlationmatrix and see how the dependency on the target variable attribution is. How do I do that with polynomial values like business travel? Could I use the operater nominal to nummerical? or are there better alternatives to show the dependencies between the label and the polynomial values?

Thank you!

MartinLiebig

Correlation is not defined for non-numerical data types. you need to use a measure which works on nominal data For example gini index.

rapid1234

@mschmitzI have to choose "normalized weight" at gini index? Otherwise the correlation is very low.

MartinLiebig

Usually not. Normalize weight normalizes all values in a way, that the top value is 1.

Keep in mind, that the normalization of gini index is totally different to the normalization of correlation. A gini index of 0.1 is usually a powerful attribute.

BR,

Martin