Supporting Functions for Packages Maintained by 'Yihui Xie'


[Up] [Top]

Documentation for package ‘xfun’ version 0.42

Help Pages

A B C D E F G I J L M N O P R S T U V W Y misc

-- A --

alnum_id Generate ID strings
append_unique Read / write files encoded in UTF-8
append_utf8 Read / write files encoded in UTF-8
as_strict_list Strict lists
attr Obtain an attribute of an object without partial matching

-- B --

base64_decode Encode/decode data into/from base64 encoding.
base64_encode Encode/decode data into/from base64 encoding.
base64_uri Generate the Data URI for a file
base_pkgs Get base R package names
bg_process Start a background process
broken_packages Find out broken packages and reinstall them
bump_version Bump version numbers

-- C --

cache_rds Cache the value of an R expression to an RDS file
compare_Rcheck Run 'R CMD check' on the reverse dependencies of a package
crandalf_check Submit check jobs to crandalf
crandalf_results Submit check jobs to crandalf
csv_options Parse comma-separated chunk options

-- D --

decimal_dot Evaluate an expression after forcing the decimal point to be a dot
del_empty_dir Delete an empty directory
dir_create Create a directory recursively by default
dir_exists Test the existence of files and directories
divide_chunk Divide chunk options from the code chunk body
download_cache Download a file from a URL and cache it on disk
download_file Try various methods to download a file
do_once Perform a task once in an R session

-- E --

embed_dir Embed a file, multiple files, or directory on an HTML page
embed_file Embed a file, multiple files, or directory on an HTML page
embed_files Embed a file, multiple files, or directory on an HTML page
env_option Retrieve a global option from both 'options()' and environment variables
existing_files Find file paths that exist
exit_call Call 'on.exit()' in a parent function

-- F --

file_exists Test the existence of files and directories
file_ext Manipulate filename extensions
file_string Read a text file and concatenate the lines by "\n"
format.xfun_record_results Run R code and record the results
format_bytes Format numbers of bytes using a specified unit
from_root Get the relative path of a path in a project relative to the current working directory

-- G --

github_api Get data from a REST API
github_releases Get the tags of Github releases of a repository
grep_sub Perform replacement with 'gsub()' on elements matched from 'grep()'
gsub_dir Search and replace strings in files
gsub_ext Search and replace strings in files
gsub_file Search and replace strings in files
gsub_files Search and replace strings in files

-- I --

install_dir Install a source package from a directory
install_github An alias of 'remotes::install_github()'
in_dir Evaluate an expression under a specified working directory
is_abs_path Test if paths are relative or absolute
is_arm64 Test for types of operating systems
is_ascii Check if a character vector consists of entirely ASCII characters
is_blank Test if a character vector consists of blank strings
is_linux Test for types of operating systems
is_macos Test for types of operating systems
is_rel_path Test if paths are relative or absolute
is_sub_path Test if a path is a subpath of a dir
is_unix Test for types of operating systems
is_web_path Test if a path is a web path
is_windows Test for types of operating systems

-- J --

json_vector A simple JSON serializer

-- L --

loadable Attach or load packages, and automatically install missing packages if requested

-- M --

magic_path Find a file or directory under a root directory
mark_dirs Mark some paths as directories
msg_cat Generate a message with 'cat()'

-- N --

n2w Convert numbers to English words
native_encode Try to use the system native encoding to represent a character vector
news2md Convert package news to the Markdown format
normalize_path Normalize paths
numbers_to_words Convert numbers to English words

-- O --

optipng Run OptiPNG on all PNG files under a directory

-- P --

parse_only Parse R code and do not keep the source
pkg_attach Attach or load packages, and automatically install missing packages if requested
pkg_attach2 Attach or load packages, and automatically install missing packages if requested
pkg_available Attach or load packages, and automatically install missing packages if requested
pkg_load Attach or load packages, and automatically install missing packages if requested
pkg_load2 Attach or load packages, and automatically install missing packages if requested
print.xfun_raw_string Print a character vector in its raw form
print.xfun_record_results Run R code and record the results
print.xfun_strict_list Strict lists
process_file Read a text file, process the text with a function, and write the text back
proc_kill Kill a process and (optionally) all its child processes
proj_root Return the (possible) root directory of a project
prose_index Find the indices of lines in Markdown that are prose (not code blocks)
protect_math Protect math expressions in pairs of backticks in Markdown

-- R --

raw_string Print a character vector in its raw form
Rcmd Run the commands 'Rscript' and 'R CMD'
read_all Read all text files and concatenate their content
read_bin Read all records of a binary file as a raw vector by default
read_utf8 Read / write files encoded in UTF-8
record Run R code and record the results
relative_path Get the relative path of a path relative to a directory
rename_seq Rename files with a sequential numeric prefix
rest_api Get data from a REST API
rest_api_raw Get data from a REST API
retry Retry calling a function for a number of times
rev_check Run 'R CMD check' on the reverse dependencies of a package
root_rules Return the (possible) root directory of a project
Rscript Run the commands 'Rscript' and 'R CMD'
Rscript_call Call a function in a new R session via 'Rscript()'
rstudio_type Type a character vector into the RStudio source editor

-- S --

same_path Test if two paths are the same after they are normalized
sans_ext Manipulate filename extensions
session_info An alternative to sessionInfo() to print session information
set_envvar Set environment variables
shrink_images Shrink images to a maximum width
sort_file Read a text file, process the text with a function, and write the text back
split_lines Split a character vector by line breaks
split_source Split source lines into complete expressions
strict_list Strict lists
strip_html Strip HTML tags
submit_cran Submit a source package to CRAN
system3 Run 'system2()' and mark its character output as UTF-8 if appropriate

-- T --

tinify Use the Tinify API to compress PNG and JPEG images
tinify_dir Use the Tinify API to compress PNG and JPEG images
tojson A simple JSON serializer
tree Turn the output of 'str()' into a tree diagram
try_error Try an expression and see if it throws an error
try_silent Try to evaluate an expression silently

-- U --

upload_ftp Upload to an FTP server via 'curl'
upload_win_builder Upload to an FTP server via 'curl'
url_accessible Test if a URL is accessible
url_filename Extract filenames from a URLs

-- V --

valid_syntax Check if the syntax of the code is valid

-- W --

with_ext Manipulate filename extensions
write_utf8 Read / write files encoded in UTF-8

-- Y --

yaml_body Partition the YAML metadata and the body in a document
yaml_load Read YAML data

-- misc --

$.xfun_strict_list Strict lists