Exercise

Standardizing features

It is important to ensure that the feature inputs to the kNN distance calculation are standardized using the scale() function. Standardization ensures that features with large mean or variance do not disproportionately influence the kNN distance score.

Instructions

100 XP

Apply the summary() function to the wine data to calculate the mean, minimum and maximum values for pH and alcohol.
Use the scale() function to create a standardized version of the wine data called wine_scaled.
Use the summary() function to wine_scaled to check that the mean and ranges have changed.