This is the code for an app which:
- builds an Ordinary Least Squares (OLS) model,
- checks the statistical properties of a model,
- visualizes:
- the histogram of errors,
- the observed vs. predicted values,
- the predicted and observed values vs time (if a target variable is a time series).
The app is available here: https://dgwozdz.shinyapps.io/ols_app/