Using https://chamame.ninjal.ac.jp/ and rvest.
Because it uses an internet resource, it fails gracefully:
when the web service is not available or its response has changed,
shows a message and returns NULL instead of an error.
Submits a text to web chamame and parses the response. Errors are handled by web_chamame().
Selects the fields by name, NOT by index: web chamame sometimes adds fields, which shifts all the indices. Errors are handled by web_chamame().
The names of the output items of web chamame,
in the same order as out_cols_chamame().
Only a few items are requested, so the header row of the result
corresponds to the cells and the columns can be selected by their names.
IPAdic is the only dictionary of web chamame that is not UniDic, and the columns of its result are different.
Web chamame returns a table even when the analysis failed, e.g. a table with an error page of the server. The positions of the columns are also checked, because they change when web chamame changes its output items. Errors are handled by web_chamame().
Helper function to fail gracefully when an internet resource is not available, as required by the CRAN repository policy.
Usage
out_cols_chamame(col_lang = "jp")
web_chamame(
text,
col_lang = "jp",
dic = "unidic-spoken",
url = "https://chamame.ninjal.ac.jp/index.html"
)
submit_chamame(html, text, col_lang = "jp", dic = "unidic-spoken")
select_chamame_fields(form, dic = "unidic-spoken")
chamame_field(field, item)
cols_chamame(dic = "unidic-spoken")
is_ipadic(dic)
extract_chamame_cols(tbl, col_lang = "jp", dic = "unidic-spoken")
check_chamame_table(tbl, dic = "unidic-spoken")
read_html_safely(url)
msg_not_available(url, cnd)
html_radio_set(form, ...)
is_radio(fields)Arguments
- col_lang
A text. "jp" or "en"
- text
A text.
- dic
A text. Dictionary of web chamame, e.g. "unidic-spoken", "gendai" or "ipadic". Use the value of the dictionary checkbox in the form.
- url
A text. URL to read.
- html
A xml_document of web chamame.
- form
vest_form object
- field
A field in a rvest_form object.
- item
A string to specify the item of
field.- tbl
A dataframe parsed from the response of web chamame.
- cnd
A try-error object.
- ...
dynamic-dots Name-value pairs giving radio button to modify.
- fields
$fields in vest_form object
Value
A character vector
A dataframe, or NULL when web chamame is not available.
A dataframe
A rvest_form object
A string
A character vector
A boolean
A dataframe
A dataframe
A xml_document, or NULL when the resource is not available.
A string
vest_form object
A boolean or vector
Details
The names of the columns differ between the dictionaries,
so they are selected by dic.
UniDic ("gendai", "unidic-spoken" and the dictionaries of the older
periods) returns 9 columns, and IPAdic returns 12 columns of its own.
Examples
if (FALSE) { # \dontrun{
# Need to connect https://chamame.ninjal.ac.jp/ .
text <-
paste0("\\u3059",
paste0(rep("\\u3082",8),collapse=""),
"\\u306e\\u3046\\u3061") |>
unescape_utf()
web_chamame(text)
} # }