Introduction To R | Interactive Course | Vertabelo Academy

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NA is Not A problem for you!

It's time for a quiz!

32/32 Congratulations

1. Introduction

2. Missing column values

3. Missing values and calculations

4. Detecting missing values

5. Number of NAs in a column

6. Removing missing values from calculations

7. Missing values – summary()

8. Removing NA values

9. Verify the lack of missing values

10. Imputing missing values

11. Handling missing values – character variables

12. Factors – example

13. Categorical variables

14. Factors to the rescue

15. Examine the factor column

16. Factors and levels

17. Factors and undefined levels

18. Converting character columns to factors

19. Factor levels and missing values

20. Levels and their order

21. Define the order of levels in a factor

22. Adding new levels with the factor() function

23. Changing level names

24. NAs and factors - summary

25. Summary exercises – scenario

32. Congratulations

Great! You've completed the last part of the course. Are you ready for a little quiz?

Click the Next Exercise to go to the quiz.

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