Key Skills for Success

Natural language processing requires knowledge of a programming language as well as an understanding of NLP concepts.

Before you begin this course, assess your R programming skills. If you can solve these challenges, you’ll have no trouble with the programming in this course. Otherwise, with a bit of extra effort, you’ll be well on your way to mastering it.

Code for the square of x

Defining functions is an essential skill in R programming. Please provide the necessary code to return the square of x.

Subset a matrix

R provides several ways to slice data. Are you familiar with them?

• Your function should accept a matrix named emails_this_week.

• The first column of emails_this_week contains random integers between one and seven, signifying the days of the week. Sunday is one, Monday is two, Tuesday is three, and so on.

• The second column of emails_this_week is the number of emails received during that day.

Write a function named myEmails to add the number of emails received on weekdays, which is defined as days with integers equaling two through five.

These examples cover commonly used skills in natural language processing. It’s important to know how to create a function and equally important to understand how to subset a matrix. When you’ve passed both exercises, you can be confident that you’re capable of understanding the code required for natural language processing with R.