The trick is to encode such variables using what is called 1-of- (N-1) encoding. For example, if a predictor variable is color, with possible values (red, blue, green), then you'd encode red as (1, 0) ...

I use Python 3 and Jupyter Notebooks to generate plots and equations with linear regression on Kaggle data. I checked the correlations and built a basic machine learning model with this dataset.

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...