Corpus class methods
A set of generic methods is available to extract basic information from
objects of the corpus class.
## S4 method for signature 'corpus' name(x) ## S4 method for signature 'corpus' get_corpus(x) ## S4 method for signature 'corpus' show(object) ## S4 method for signature 'corpus' x$name ## S4 method for signature 'corpus' get_info(x) ## S4 method for signature 'corpus' show_info(x)
x |
An object of class |
object |
An object of class |
name |
A (single) s-attribute. |
A corpus object can have a name, which can be retrieved using
the name-method.
Use get_corpus-method to get the corpus ID from the slot
corpus of the corpus object.
The show-method will show basic information on the
corpus object.
Applying the '$'-method on a corpus will return the values for the
s-attribute stated with argument name.
Use get_info to get the the content of the info file for the
corpus (usually in the data directory of the corpus) and return it as a
character vector. Returns NULL if there is not info file.
The show_info-method will get the content of the info
file for a corpus, turn it into an html document, and show the result in
the viewer pane of RStudio. If the filename of the info file ends on "md",
the document is rendered as markdown.
# get/show information on corpora
corpus("REUTERS") %>% get_info()
corpus("REUTERS") %>% show_info()
corpus("GERMAPARLMINI") %>% get_info()
corpus("GERMAPARLMINI") %>% show_info()
# show-method
if (interactive()) corpus("REUTERS") %>% show()
if (interactive()) corpus("REUTERS") # show is called implicitly
# get corpus ID
corpus("REUTERS") %>% get_corpus()
# use $ to access s_attributes quickly
use("polmineR")
g <- corpus("GERMAPARLMINI")
g$date
corpus("GERMAPARLMINI")$date #
corpus("GERMAPARLMINI") %>% s_attributes(s_attribute = "date") # equivalent
use("polmineR")
sc <- subset("GERMAPARLMINI", date == "2009-10-27")
sc$datePlease choose more modern alternatives, such as Google Chrome or Mozilla Firefox.