Todo
- ols (coefficients, fitted, resids)
- rss, tss, mse, aic, studentized resids
- rsquared, adj. rsquared
- cooks distance, leverage
- variance-covariance mat
- variance inflation factors
- dfbetas, dffits
- variance of beta coefficients, confidence intervals
- durbin watson test
- f-statistics
- z-scores
- stepwise regression
- least angle regression
- ridge regression
- lasso / forward-stagewise
- principal component regression
- json encoding/decoding
- examples