Hello!

Today:

1. You can still take notes in ML/readme .md
2. Finishing ML_worksheet1.ipynb
   • Last class: ColumnTransformer and pipelines, fit and predict
   • Today: cross_validate and gridsearch_cv
3. ML_worksheet2.ipynb: Classification models
   • How to evaluate them
   • Fixing our bad model
   • Thinking about the objective: what to maximize and/or minimize in your model