whe_pre_gram: Get precending bigrams

In news-r/webhoserx: Extension for the webhoser package

Description

Get precending bigrams

Usage

whe_pre_gram(wh, n = 2, flatten = FALSE)

## S3 method for class 'data.frame'
whe_pre_gram(wh, n = 2, flatten = FALSE)

## S3 method for class 'character'
whe_pre_gram(wh, n = 2, flatten = FALSE)

Arguments

wh	highlighted object returned by wh_collect, see examples.
n	number of terms, defaults to 2.
flatten	whether to flatten ngrams.

Value

if data.frame is passed will append a column named pre.gram.n where n is the number of terms, parameter n. If character vector is passed will return list (or vector dependeing on flatten) of n-grams.

See Also

whe_post_gram

Examples

## Not run: 
library(webhose)
token <- wh_token("xXX-x0X0xX0X-00X")

token %>%
  wh_news(q = 'golang') %>%  # use highlight!
  wh_collect() -> rstats # collect results

rstats %>%
  whe_pre_gram() -> pre_bigrams

library(dplyr)

rstats %>%
  mutate(pre.gram = whe_pre_gram(highlightText, n = 3, flatten = TRUE)) -> pre_trigrams

## End(Not run)

news-r/webhoserx documentation built on June 10, 2019, 12:27 a.m.