bundle: Bundle Class

In polmineR: Verbs and Nouns for Corpus Analysis

Bundle Class

Description

A bundle is used to combine several objects (partition, context, features, cooccurrences objects) into one S4 class object. Typically, a class inheriting from the bundle superclass will be used. When working with a context_bundle, a features_bundle, a cooccurrences_bundle, or a context_bundle, a similar set of standard methods is available to perform transformations.

Usage

## S4 replacement method for signature 'bundle'
name(x) <- value

## S4 method for signature 'bundle'
length(x)

## S4 method for signature 'bundle'
names(x)

## S4 replacement method for signature 'bundle,vector'
names(x) <- value

## S4 method for signature 'bundle'
unique(x)

## S4 method for signature 'bundle,bundle'
e1 + e2

## S4 method for signature 'bundle,textstat'
e1 + e2

## S4 method for signature 'bundle'
x[[i]]

## S4 method for signature 'bundle,ANY,ANY,ANY'
x[i]

## S4 replacement method for signature 'bundle'
x[[i]] <- value

## S4 method for signature 'bundle'
x$name

## S4 replacement method for signature 'bundle'
x$name <- value

## S4 method for signature 'bundle'
sample(x, size)

## S4 method for signature 'list'
as.bundle(object, ...)

## S4 method for signature 'textstat'
as.bundle(object)

## S3 method for class 'bundle'
as.data.table(x, keep.rownames, col, ...)

## S4 method for signature 'bundle'
as.matrix(x, col)

## S4 method for signature 'bundle'
subset(x, ...)

## S4 method for signature 'bundle'
as.list(x)

## S3 method for class 'bundle'
as.list(x, ...)

## S4 method for signature 'bundle'
get_corpus(x)

Arguments

x	a bundle object
value	character string with a name to be assigned
e1	object 1
e2	object 2
i	integer or character values for indexing a bundle object.
name	The name of an object in the bundle object.
size	number of items to choose to generate a sample
object	A bundle object.
...	Further parameters
keep.rownames	Required argument to safeguard consistency with S3 method definition in the data.table package. Unused in this context.
col	columns of the data.table to use to generate an object.

Slots

corpus

The CWB corpus the xobjects in the bundle are based on, a length 1 character vector.

objects

An object of class list.

p_attribute

Object of class character.

encoding

The encoding of the corpus.

Author(s)

Andreas Blaette

Examples

use("RcppCWB", "REUTERS")

# generate bundle with articles in REUTERS corpus
b <- partition_bundle("REUTERS", s_attribute = "id")

# basic operations
length(b)
names(b)
get_corpus(b)
summary(b)

# enrich with count for p-attribute
b <- enrich(b, p_attribute = "word")

# Indexing and accessing bundle objects
reu <- corpus("REUTERS") %>% split(s_attribute = "id")
reu[1:3]
reu[-1]
reu[-(1:10)]
reu["127"]
reu$`127` # alternative access
reu[c("127", "273")]
reu[["127"]] <- NULL
pb <- partition_bundle("GERMAPARLMINI", s_attribute = "party")
pb$"NA" <- NULL # quotation needed if name is "NA"

# Turn bundle into data.table (not tested to save time)

dt <- partition_bundle("REUTERS", s_attribute = "id") %>%
  cooccurrences(query = "oil", cqp = FALSE) %>%
  as.data.table(col = "ll")

polmineR documentation built on Nov. 2, 2023, 5:52 p.m.