AFINN: I'm your Huckleberry

Now we transition to the AFINN lexicon. The AFINN lexicon has numeric values from 5 to -5, not just positive or negative. Unlike the Bing lexicon's sentiment, the AFINN lexicon's sentiment score column is called score.

As before, you apply inner_join() then count(). Next, to sum the scores of each line, we use dplyr's group_by() and summarize() functions. The group_by() function takes an existing data frame and converts it into a grouped data frame where operations are performed "by group". Then, the summarize() function lets you calculate a value for each group in your data frame using a function that aggregates data, like sum() or mean(). So, in our case we can do something like

data_frame %>% 
    group_by(book_line) %>% 
    summarize(total_score = sum(book_line))

In the tidy version of Huckleberry Finn, line 9703 contains words "best", "ever", "fun", "life" and "spirit". "best" and "fun" have AFINN scores of 3 and 4 respectively. After aggregating, line 9703 will have a total score of 7.

In the tidyverse, filter() is preferred to subset() because it combines the functionality of subset() with simpler syntax. Here is an example that filter()s data_frame where some value in column1 is equal to 24. Notice the column name is not in quotes.

filter(data_frame, column1 == 24)

The afinn object contains the AFINN lexicon. The huck object is a tidy version of Mark Twain's Adventures of Huckleberry Finn for analysis.

Line 5400 is All the loafers looked glad; I reckoned they was used to having fun out of Boggs. Stopwords and punctuation have already been removed in the dataset.

Run the code to look at line 5400, and see the sentiment scores of some words.
inner_join() huck to the afinn lexicon.
- Remember huck is already piped into the function so just add the lexicon.
- Join by the term column in the text and the word column in the lexicon.
Use count() with score and line to tally/count observations by group.
- Assign the result to huck_afinn.

Take Hint (-9 XP)

Exercise

AFINN: I'm your Huckleberry

Instructions 1/3