JSTOR_2bigrams: Plot the frequency of one bigram against bigram over time in...

In benmarwick/JSTORr: Simple Text Mining and Document Clustering of JSTOR Journal Articles

Description

Function to plot changes in the relative frequency of two bigrams over time. The relative frequency is the frequency of the bigram in a document divided by the total number of bigrams in a document. For use with JSTOR's Data for Research datasets (http://dfr.jstor.org/).

Usage

JSTOR_2bigrams(unpack2grams, bigram1, bigram2, span = 0.4)

Arguments

unpack2grams	object returned by the function JSTOR_unpack2grams.
bigram1	two words, surrounded by standard quote marks, or a vector of bigrams.
bigram2	two words, surrounded by standard quote marks, or a vector of bigrams.
span	span of the lowess line (controls the degree of smoothing). Default is 0.4

Value

Returns a ggplot object with publication year on the horizontal axis and log relative frequency on the vertical axis. Each point represents a single document.

Examples

## JSTOR_2bigrams(unpack2grams, "pirate booty", "treasure chest")
## JSTOR_2bigrams(unpack2grams, c("treasure chest", "musket balls"), c("jolly roger"), span = 0.2)

benmarwick/JSTORr documentation built on May 12, 2019, 12:59 p.m.