Spell Check Interface
Spell check given files via Aspell, Hunspell or Ispell.
a character vector with the names of files to be checked.
an optional filter for processing the files before spell
checking, given as either a function (with formals
a list or character vector of control options for the spell checker.
the encoding of the files. Recycled as needed.
a character string giving the name (if on the system
path) or full path of the spell check program to be used, or
a character vector of names or file paths of additional R level dictionaries to use. Elements with no path separator specify R system dictionaries (in subdirectory ‘share/dictionaries’ of the R home directory). The file extension (currently, only ‘.rds’) can be omitted.
The spell check programs employed must support the so-called Ispell pipe interface activated via command line option -a. In addition to the programs, suitable dictionaries need to be available. See http://aspell.net, http://hunspell.sourceforge.net/ and http://lasr.cs.ucla.edu/geoff/ispell.html, respectively, for obtaining the Aspell, Hunspell and (International) Ispell programs and dictionaries.
The currently available built-in filters are
"R" is for R code and extracts the message string
constants in calls to
ngettext (the unnamed string constants for the first
msg2 string constants,
respectively, for the latter two).
"pot" is for message string catalog ‘.pot’ files.
Both have an argument
ignore allowing to give regular
expressions for parts of message strings to be ignored for spell
checking: e.g., using
"[ \t]'[^']*'[ \t[:punct:]]" ignores all
text inside single quotes.
"dcf" is for files in Debian Control File format.
The fields to keep can be controlled by argument
character vector with the respective field names). By default,
Title and Description fields are kept.
The print method for the objects returned by
aspell has an
indent argument controlling the indentation of the positions of
possibly mis-spelled words. The default is 2; Emacs users may find it
useful to use an indentation of 0 and visit output in grep-mode. It
also has a
verbose argument: when this is true, suggestions for
replacements are shown as well.
It is possible to employ additional R level dictionaries. Currently,
these are files with extension ‘.rds’ obtained by serializing
character vectors of word lists using
saveRDS. If such
dictionaries are employed, they are combined into a single word list
file which is then used as the spell checker's personal dictionary
(option -p): hence, the default personal dictionary is not
used in this case.
A data frame inheriting from
aspell (which has a useful print
method) with the information about possibly mis-spelled words.
Kurt Hornik and Duncan Murdoch (2011), Watch your spelling! The R Journal 3(2), 22–28. http://journal.r-project.org/archive/2011-2/RJournal_2011-2_Hornik+Murdoch.pdf.
aspell-utils for utilities for spell checking packages.
Package Aspell on Omegahat (http://www.omegahat.net/Aspell) for a fine-grained R interface to the Aspell library.
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## Not run: ## To check all Rd files in a directory, (additionally) skipping the ## \references sections. files <- Sys.glob("*.Rd") aspell(files, filter = list("Rd", drop = "\\references")) ## To check all Sweave files files <- Sys.glob(c("*.Rnw", "*.Snw", "*.rnw", "*.snw")) aspell(files, filter = "Sweave", control = "-t") ## To check all Texinfo files (Aspell only) files <- Sys.glob("*.texi") aspell(files, control = "--mode=texinfo") ## End(Not run) ## List the available R system dictionaries. Sys.glob(file.path(R.home("share"), "dictionaries", "*.rds"))