README.md

In quanteda/quanteda.tidy: Tidyverse extensions to the quanteda

quanteda.tidy

About

quanteda.tidy extends the quanteda package with functionality from the “tidyverse”, especially dplyr. Note that this is not the same as tidytext, which stretches tokens into data.frames. Instead, tidy functions operate only on document variables, but extends these functions (from dplyr) to work on quanteda objects as if they were tibbles or data.frames.

Installation

You can install quanteda.tidy from GitHub with:

devtools::install_github("quanteda/quanteda.tidy")

Examples

Adding a document variable for full president name:

library("quanteda.tidy", warn.conflicts = FALSE)
## Loading required package: quanteda
## Package version: 3.0.0
## Unicode version: 10.0
## ICU version: 61.1
## Parallel computing: 12 of 12 threads used.
## See https://quanteda.io for tutorials and examples.

data_corpus_inaugural %>%
  transmute(fullname = paste(FirstName, President, sep = ", ")) %>%
  summary(n = 5)
## Corpus consisting of 59 documents, showing 5 documents:
## 
##             Text Types Tokens Sentences           fullname
##  1789-Washington   625   1537        23 George, Washington
##  1793-Washington    96    147         4 George, Washington
##       1797-Adams   826   2577        37        John, Adams
##   1801-Jefferson   717   1923        41  Thomas, Jefferson
##   1805-Jefferson   804   2380        45  Thomas, Jefferson

data_corpus_inaugural %>%
  mutate(fullname = paste(FirstName, President, sep = ", ")) %>%
  summary(n = 5)
## Corpus consisting of 59 documents, showing 5 documents:
## 
##             Text Types Tokens Sentences Year  President FirstName
##  1789-Washington   625   1537        23 1789 Washington    George
##  1793-Washington    96    147         4 1793 Washington    George
##       1797-Adams   826   2577        37 1797      Adams      John
##   1801-Jefferson   717   1923        41 1801  Jefferson    Thomas
##   1805-Jefferson   804   2380        45 1805  Jefferson    Thomas
##                  Party           fullname
##                   none George, Washington
##                   none George, Washington
##             Federalist        John, Adams
##  Democratic-Republican  Thomas, Jefferson
##  Democratic-Republican  Thomas, Jefferson

Filtering documents based on years:

data_corpus_inaugural %>%
  filter(President == "Roosevelt") %>%
  summary()
## Corpus consisting of 5 documents, showing 5 documents:
## 
##            Text Types Tokens Sentences Year President   FirstName      Party
##  1905-Roosevelt   404   1079        33 1905 Roosevelt    Theodore Republican
##  1933-Roosevelt   743   2057        85 1933 Roosevelt Franklin D. Democratic
##  1937-Roosevelt   725   1989        96 1937 Roosevelt Franklin D. Democratic
##  1941-Roosevelt   526   1519        68 1941 Roosevelt Franklin D. Democratic
##  1945-Roosevelt   275    633        27 1945 Roosevelt Franklin D. Democratic

Renaming document variables:

data_corpus_inaugural %>%
  rename(LastName = President) %>%
  select(FirstName, LastName) %>%
  summary(n = 5)
## Corpus consisting of 59 documents, showing 5 documents:
## 
##             Text Types Tokens Sentences FirstName   LastName
##  1789-Washington   625   1537        23    George Washington
##  1793-Washington    96    147         4    George Washington
##       1797-Adams   826   2577        37      John      Adams
##   1801-Jefferson   717   1923        41    Thomas  Jefferson
##   1805-Jefferson   804   2380        45    Thomas  Jefferson

Glimpse (from tibble):

glimpse(data_corpus_inaugural)
## Rows: 59
## Columns: 6
## $ doc_id    <chr> "1789-Washington", "1793-Washington", "1797-Adams", "1801-Je…
## $ text      <chr> "Fellow-Cit…", "Fellow cit…", "When it wa…", "Friends an…", …
## $ Year      <int> 1789, 1793, 1797, 1801, 1805, 1809, 1813, 1817, 1821, 1825, …
## $ President <chr> "Washington", "Washington", "Adams", "Jefferson", "Jefferson…
## $ FirstName <chr> "George", "George", "John", "Thomas", "Thomas", "James", "Ja…
## $ Party     <fct> none, none, Federalist, Democratic-Republican, Democratic-Re…

Slice operations:

slice(data_corpus_inaugural, 1:3)
## Corpus consisting of 3 documents and 4 docvars.
## 1789-Washington :
## "Fellow-Citizens of the Senate and of the House of Representa..."
## 
## 1793-Washington :
## "Fellow citizens, I am again called upon by the voice of my c..."
## 
## 1797-Adams :
## "When it was first perceived, in early times, that no middle ..."

slice_head(data_corpus_inaugural, prop = .10)
## Corpus consisting of 5 documents and 4 docvars.
## 1789-Washington :
## "Fellow-Citizens of the Senate and of the House of Representa..."
## 
## 1793-Washington :
## "Fellow citizens, I am again called upon by the voice of my c..."
## 
## 1797-Adams :
## "When it was first perceived, in early times, that no middle ..."
## 
## 1801-Jefferson :
## "Friends and Fellow Citizens: Called upon to undertake the du..."
## 
## 1805-Jefferson :
## "Proceeding, fellow citizens, to that qualification which the..."
slice_tail(data_corpus_inaugural, n = 3)
## Corpus consisting of 3 documents and 4 docvars.
## 2013-Obama :
## "Vice President Biden, Mr. Chief Justice, Members of the Unit..."
## 
## 2017-Trump :
## "Chief Justice Roberts, President Carter, President Clinton, ..."
## 
## 2021-Biden.txt :
## "Chief Justice Roberts, Vice President Harris, Speaker Pelosi..."

set.seed(42)
slice_sample(data_corpus_inaugural, prop = .50)
## Corpus consisting of 29 documents and 4 docvars.
## 1981-Reagan :
## "Senator Hatfield, Mr. Chief Justice, Mr. President, Vice Pre..."
## 
## 1933-Roosevelt :
## "I am certain that my fellow Americans expect that on my indu..."
## 
## 1789-Washington :
## "Fellow-Citizens of the Senate and of the House of Representa..."
## 
## 1885-Cleveland :
## "Fellow citizens, in the presence of this vast assemblage of ..."
## 
## 1825-Adams :
## "In compliance with an usage coeval with the existence of our..."
## 
## 1929-Hoover :
## "My Countrymen: This occasion is not alone the administration..."
## 
## [ reached max_ndoc ... 23 more documents ]

quanteda/quanteda.tidy documentation built on April 11, 2021, 3:44 p.m.