Removing from a list
The natural next step is to learn how to remove elements from a list. You decide that even though Dan is your best friend, you don't want his info in your list. To remove dans_movie:
my_list$dans_movie <- NULL
my_list
$my_words
[1] "I <3 R"
$my_numbers
[1] 42 24
Using NULL is the easiest way to remove an element from your list! If your list is not named, you can also remove elements by position using my_list[1] <- NULL or my_list[[1]] <- NULL.
This is a part of the course
“Introduction to R for Finance”
Exercise instructions
- Take a look at your
portfolio. It seems that someone has addedmicrosoftstock that you did not buy! - Remove the
microsoftelement ofportfoliousingNULL.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Take a look at portfolio
# Remove the microsoft stock prices from your portfolio
This exercise is part of the course
Introduction to R for Finance
Learn essential data structures such as lists and data frames and apply that knowledge directly to financial examples.
Wouldn't it be nice if there was a way to hold related vectors, matrices, or data frames together in R? In this final chapter, you will explore lists and many of their interesting features by building a small portfolio of stocks.
Exercise 1: What is a list?Exercise 2: Create a listExercise 3: Named listsExercise 4: Access elements in a listExercise 5: Adding to a listExercise 6: Removing from a listExercise 7: A few list creating functionsExercise 8: Split itExercise 9: Split-Apply-CombineExercise 10: AttributesExercise 11: Congratulations!What is DataCamp?
Learn the data skills you need online at your own pace—from non-coding essentials to data science and machine learning.