pos {RcppMeCab}

part-of-speech tagger

Description

pos returns part-of-speech (POS) tagged morpheme of the sentence.

Usage

pos(sentence, join = TRUE, format = c("list", "data.frame"), sys_dic = "",
  user_dic = "")

Arguments

sentence

A character vector of any length. For analyzing multiple sentences, put them in one character vector.

join

A bool to decide the output format. The default value is TRUE. If FALSE, the function will return morphemes only, and tags put in the attribute. if format="data.frame", then this will be ignored.

format

A data type for the result. The default value is "list". You can set this to "data.frame" to get a result as data frame format.

sys_dic

A location of system MeCab dictionary. The default value is "".

user_dic

A location of user-specific MeCab dictionary. The default value is "".

Details

This is a basic function for MeCab part-of-speech tagger. The function gets a character vector of any length and runs a loop inside C++ to provide faster processing.

You can add a user dictionary to user_dic. It should be compiled by mecab-dict-index. You can find an explatation about compiling a user dictionary in the https://github.com/junhewk/RcppMeCab.

You can also set a system dictionary especially if you are using multiple dictionaries (for example, using both IPA and Juman dictionary at the same time in Japanese) in sys_dic. Using options(mecabSysDic=), you can set your prefered system dictionary to the R terminal.

If you want to get a morpheme only, use join = False to put tag names on the attribute. Basically, the function will return a list of character vectors with (morpheme)/(tag) elements.

Value

A string vector of POS tagged morpheme will be returned in conjoined character vecter form. Element name of the list are original phrases

Examples

## Not run: 
sentence <- c(#some UTF-8 texts)
pos(sentence)
pos(sentence, join = FALSE)
pos(sentence, format = "data.frame")
pos(sentence, user_dic = "~/user_dic.dic")
# System dictionary example: in case of using mecab-ipadic-NEologd
pos(sentence, sys_dic = "/usr/local/lib/mecab/dic/mecab-ipadic-neologd/")

## End(Not run)