update remote with unsaved py code

upload req data for ch1 subsections, complete ch1

multivariate analysis for py, R and jupyter, upload req data

upload new df, update ch1 ipynb, R and py files

update remote with unsaved work from last commit

complete first few subsections of ch1 for both py and R

write jupyter notebook for ch1

initialize .py environments, import ch1 csv

initial commit for ps4ds

Initial commit