R: Recipes for Analysis, Visualization and Machine Learning

Measuring the performance of the regression model

To measure the performance of a regression model, we can calculate the distance from predicted output and the actual output as a quantifier of the performance of the model. Here, we often use the root mean square error (RMSE), relative square error (RSE) and R-Square as common measurements. In the following recipe, we will illustrate how to compute these measurements from a built regression model.

Getting ready

In this recipe, we will use the Quartet dataset, which contains four regression datasets, as our input data source.

How to do it...

Perform the following steps to measure the performance of the regression model:

1. Load the Quartet dataset from the car package:

   > library(car)
   > data(Quartet)
   

2. Plot ...