qdap (version 0.2.5)

ngrams: Generate ngrams

Description

Transcript apply ngrams.

Usage

ngrams(text.var, grouping.var = NULL, n = 2)

Arguments

text.var

The text variable

grouping.var

The grouping variables. Default NULL generates one word list for all text. Also takes a single grouping variable or a list of 1 or more grouping variables.

n

The max number of grams calculate.

Value

• Returns a list of:
• raw
  A list of pasted single vectors of the ngrams per row.
• group
  A list of pasted vectors of ngrams grouped by grouping.var.
• unlist1
  A list of a single vector of pasted ngrams per grouping.var in the order used.
• unlist2
  A list of a single vector of pasted ngrams per grouping.var in alphabetical order.
• group_n
  A list of a list of vectors of ngrams per grouping.var & n (not pasted).
• all
  A single vector of pasted ngrams sorted alphabetically.
• all_n
  A list of lists a single vectors of ngrams sorted alphabetically (not pasted).

Examples

ngrams(DATA$state, DATA$person, 2)
ngrams(DATA$state, DATA$person, 3)
ngrams(DATA$state, , 3)
with(mraja1, ngrams(dialogue, list(sex, fam.aff), 3))