jst_define_import: Define an import specification

In jstor: Read Data from JSTOR/DfR

Define an import specification

Description

Define which parts of a zip file should be converted via which functions.

Usage

jst_define_import(...)

Arguments

...	Named arguments with bare function names.

Details

The function accepts the following names: article, book, report, pamphlet, ngram1, ngram2, ngram3. The corresponding files from a .zip-archive will be imported via the supplied functions.

Value

A specification of imports which is necessary for jst_import_zip().

Examples

# articles will be imported via `jst_get_article()` and `jst_get_authors()`
jst_define_import(article = c(jst_get_article, jst_get_authors))

# define a specification for importing article metadata and unigrams (ngram1)
jst_define_import(article = jst_get_article,
                  ngram1 = jst_get_ngram)
                  
                  
# import all four types with one function each
jst_define_import(article = jst_get_article,
                  book = jst_get_book,
                  report = jst_get_book,
                  pamphlet = jst_get_article)
                  
# import all four types with multiple functions
jst_define_import(article = c(jst_get_article, jst_get_authors, jst_get_references),
                  book = c(jst_get_book, jst_get_chapters),
                  report = jst_get_book,
                  pamphlet = jst_get_article)

# if you want to import chapters with authors, you can use an anonymous
# function

chapters_w_authors <- function(x) jst_get_chapters(x, authors = TRUE)
jst_define_import(book = chapters_w_authors)


## Not run: 
# define imports
imports <- jst_define_import(article = c(jst_get_article, jst_get_authors))

# convert the files to .csv
jst_import_zip("my_archive.zip", out_file = "my_out_file", 
                 import_spec = imports)

## End(Not run)

jstor documentation built on Aug. 16, 2023, 5:09 p.m.