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  3. Dimensionality Reduction in R

Exercise

Create a missing values recipe

In the previous exercises, you manually calculated the missing value ratio and created a filter to reduce the dimensionality of house_sales_df. The tidymodels package contains a recipe step to apply a missing values ratio automatically—step_filter_missing(). The advantages of the tidymodels approach is that it allows you reuse the recipe on other data sets and simplifies the move to a production environment. In this exercise, you will use the step_filter_missing() function to perform dimensionality reduction house_sales_df based on missing values.

The tidyverse and tidymodels packages have been loaded for you.

Instructions

100 XP
  • Use recipe() to create a missing values filter with a threshold of 0.5.
  • Apply the missing_vals_recipe to house_sales_df.