qdapRegex (version 0.1.1)

rm_hash: Remove/Replace/Extract Hash Tags

Description

Remove/replace/extract hash tags from a string.

Usage

rm_hash(text.var, trim = !extract, clean = TRUE, pattern = "@rm_hash",
  replacement = "", extract = FALSE,
  dictionary = getOption("regex.library"), ...)

Arguments

text.var

The text variable.

trim

logical. If TRUE removes leading and trailing white spaces.

clean

trim logical. If TRUE extra white spaces and escaped character will be removed.

pattern

A character string containing a regular expression (or character string for fixed = TRUE) to be matched in the given character vector. Default, @rm_hash uses the rm_hash regex from the regular expression dictiona

replacement

Replacement for matched pattern.

extract

logical. If TRUE the hash tags are extracted into a list of vectors.

dictionary

A dictionary of canned regular expressions to search within if pattern begins with "@rm_".

...

Other arguments passed to gsub.

Value

• Returns a character string with hash tags removed.

References

The hash tag regular expression was taken from: http://stackoverflow.com/a/25096474/1000343

See Also

gsub, stri_extract_all_regex

Examples

x <- c("@hadley I like #rstats for #ggplot2 work.",
    "Difference between #magrittr and #pipeR, both implement pipeline operators for #rstats:
        http://renkun.me/r/2014/07/26/difference-between-magrittr-and-pipeR.html @timelyportfolio",
    "Slides from great talk: @ramnath_vaidya: Interactive slides from Interactive Visualization
        presentation #user2014. http://ramnathv.github.io/user2014-rcharts/#1"
)

rm_hash(x)
rm_hash(rm_tag(x))
rm_hash(x, extract=TRUE)