2021
{geofacet} allows to position plots in a similar pattern to the original geography, which provide more information than classical chloropleths but is also harder to read. In this tutorial we will see a simple approach to mix both approaches.
In this third part of the tutorial, we will now evaluate the error associated with the model predictions (the Root Mean Square Error, RMSE), and then try to decrease this error by optimizing one of the model parameter.