utils: The R Utils Package
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> library(utils)
バージョン: 3.3.1
| 関数名 | 概略 |
|---|---|
BATCH |
Batch Execution of R |
COMPILE |
Compile Files for Use with R |
INSTALL |
Install Add-on Packages |
LINK |
Create Executable Programs |
Question |
Documentation Shortcuts |
REMOVE |
Remove Add-on Packages |
RHOME |
R Home Directory |
RShowDoc |
Show R Manuals and Other Documentation |
RSiteSearch |
Search for Key Words or Phrases in Documentation |
Rprof |
Enable Profiling of R's Execution |
Rprofmem |
Enable Profiling of R's Memory Use |
Rscript |
Scripting Front-End for R |
Rtangle |
R Driver for Stangle |
RweaveLatex |
R/LaTeX Driver for Sweave |
SHLIB |
Build Shared Object/DLL for Dynamic Loading |
Sweave |
Automatic Generation of Reports |
SweaveSyntConv |
Convert Sweave Syntax |
URLencode |
Encode or Decode a (partial) URL |
View |
Invoke a Data Viewer |
adist |
Approximate String Distances |
alarm |
Alert the User |
apropos |
Find Objects by (Partial) Name |
aregexec |
Approximate String Match Positions |
as.roman |
Roman Numerals |
aspell |
Spell Check Interface |
aspell-utils |
Spell Check Utilities |
available.packages |
List Available Packages at CRAN-like Repositories |
bibentry |
Bibliography Entries |
browseEnv |
Browse Objects in Environment |
browseURL |
Load URL into a WWW Browser |
browseVignettes |
List Vignettes in an HTML Browser |
bug.report |
Send a Bug Report |
build |
Utilities for Building and Checking Add-on Packages |
capture.output |
Send Output to a Character String or File |
changedFiles |
Detect which files have changed |
chooseBioCmirror |
Select a Bioconductor Mirror |
chooseCRANmirror |
Select a CRAN Mirror |
citEntry |
Bibliography Entries (Older Interface) |
citation |
Citing R and R Packages in Publications |
cite |
Cite a bibliography entry. |
close.socket |
Close a Socket |
combn |
Generate All Combinations of n Elements, Taken m at a Time |
compareVersion |
Compare Two Package Version Numbers |
contrib.url |
Find Appropriate Paths in CRAN-like Repositories |
count.fields |
Count the Number of Fields per Line |
create.post |
Ancillary Function for Preparing Emails and Postings |
data |
Data Sets |
dataentry |
Spreadsheet Interface for Entering Data |
debugger |
Post-Mortem Debugging |
demo |
Demonstrations of R Functionality |
download.file |
Download File from the Internet |
download.packages |
Download Packages from CRAN-like Repositories |
edit |
Invoke a Text Editor |
edit.data.frame |
Edit Data Frames and Matrices |
example |
Run an Examples Section from the Online Help |
file.edit |
Edit One or More Files |
file_test |
Shell-style Tests on Files |
findLineNum |
Find the Location of a Line of Source Code, or Set a Breakpoint There. |
fix |
Fix an Object |
flush.console |
Flush Output to A Console |
formatUL |
Format Unordered and Ordered Lists |
getAnywhere |
Retrieve an R Object, Including from a Namespace |
getFromNamespace |
Utility functions for Developing Namespaces |
getParseData |
Get detailed parse information from object. |
getS3method |
Get An S3 Method |
getSrcFilename |
Source Reference Utilities |
glob2rx |
Change Wildcard or Globbing Pattern into Regular Expression |
globalVariables |
Declarations Used in Checking a Package |
head |
Return the First or Last Part of an Object |
help |
Documentation |
help.request |
Send a Post to R-help |
help.search |
Search the Help System |
help.start |
Hypertext Documentation |
install.packages |
Install Packages from Repositories or Local Files |
installed.packages |
Find Installed Packages |
localeToCharset |
Select a Suitable Encoding Name from a Locale Name |
ls.str |
List Objects and their Structure |
maintainer |
Show Package Maintainer |
make.packages.html |
Update HTML Package List |
make.socket |
Create a Socket Connection |
memory.size |
Report on Memory Allocation |
menu |
Menu Interaction Function |
methods |
List Methods for S3 Generic Functions or Classes |
mirrorAdmin |
Managing Repository Mirrors |
modifyList |
Recursively Modify Elements of a List |
news |
Build and Query R or Package News Information |
nsl |
Look up the IP Address by Hostname |
object.size |
Report the Space Allocated for an Object |
package.skeleton |
Create a Skeleton for a New Source Package |
packageDescription |
Package Description |
packageName |
Find package associated with an environment. |
packageStatus |
Package Management Tools |
page |
Invoke a Pager on an R Object |
person |
Persons |
process.events |
Trigger event handling |
prompt |
Produce Prototype of an R Documentation File |
promptData |
Generate Outline Documentation for a Data Set |
promptPackage |
Generate a Shell for Documentation of a Package |
rcompgen |
A Completion Generator for R |
read.DIF |
Data Input from Spreadsheet |
read.fortran |
Read Fixed-Format Data in a Fortran-like Style |
read.fwf |
Read Fixed Width Format Files |
read.socket |
Read from or Write to a Socket |
read.table |
Data Input |
recover |
Browsing after an Error |
relist |
Allow Re-Listing an unlist()ed Object |
remove.packages |
Remove Installed Packages |
removeSource |
Remove Stored Source from a Function. |
rtags |
An Etags-like Tagging Utility for R |
savehistory |
Load or Save or Display the Commands History |
select.list |
Select Items from a List |
sessionInfo |
Collect Information About the Current R Session |
setRepositories |
Select Package Repositories |
stack |
Stack or Unstack Vectors from a Data Frame or List |
str |
Compactly Display the Structure of an Arbitrary R Object |
summaryRprof |
Summarise Output of R Sampling Profiler |
tar |
Create a Tar Archive |
toLatex |
Converting R Objects to BibTeX or LaTeX |
txtProgressBar |
Text Progress Bar |
type.convert |
Type Conversion on Character Variables |
untar |
Extract or List Tar Archives |
unzip |
Extract or List Zip Archives |
update.packages |
Compare Installed Packages with CRAN-like Repositories |
url.show |
Display a text URL |
utils-deprecated |
Deprecated Functions in Package 'utils' |
utils-package |
The R Utils Package |
vignette |
View or List Package Vignettes |
write.table |
Data Output |
zip |
Create Zip archives |
apropos / find
オブジェクトを見つける
> # apropos(what, where = FALSE, ignore.case = TRUE, mode = "any")
> apropos("^pr")
[1] "Prague" "prcomp"
[3] "precip" "preconditions"
[5] "predict" "predict"
[7] "predict" "predict.downscale"
[9] "predict.glm" "predict.lm"
[11] "predict.rfsrc" "preDrawDetails"
[13] "prepanel.default.bwplot" "prepanel.default.cloud"
[15] "prepanel.default.densityplot" "prepanel.default.histogram"
[17] "prepanel.default.levelplot" "prepanel.default.parallel"
[19] "prepanel.default.qq" "prepanel.default.qqmath"
[21] "prepanel.default.splom" "prepanel.default.xyplot"
[23] "prepanel.lmline" "prepanel.loess"
[25] "prepanel.qqmathline" "prepanel.spline"
[27] "prepanel.tmd.default" "prepanel.tmd.qqmath"
[29] "prepareData" "prepend"
[31] "preplot" "present"
[33] "PresentationOfLord" "presidential"
[35] "presidents" "pressure"
[37] "prettify" "pretty"
[39] "pretty.default" "prettyNum"
[41] "princomp" "print"
[43] "print" "print"
[45] "print" "print.AsIs"
[47] "print.by" "print.condition"
[49] "print.connection" "print.data.frame"
[51] "print.Date" "print.default"
[53] "print.difftime" "print.Dlist"
[55] "print.DLLInfo" "print.DLLInfoList"
[57] "print.DLLRegisteredRoutines" "print.DMS"
[59] "print.factor" "print.function"
[61] "print.hexmode" "print.libraryIQR"
[63] "print.listof" "print.NativeRoutineList"
[65] "print.noquote" "print.numeric_version"
[67] "print.octmode" "print.packageInfo"
[69] "print.POSIXct" "print.POSIXlt"
[71] "print.proc_time" "print.restart"
[73] "print.rfsrc" "print.rle"
[75] "print.simple.list" "print.srcfile"
[77] "print.srcref" "print.summary.table"
[79] "print.summaryDefault" "print.table"
[81] "print.warnings" "printCoefmat"
[83] "printcp" "prints_text"
[85] "printSpMatrix" "printSpMatrix2"
[87] "prior_options" "prmatrix"
[89] "problems" "proc.time"
[91] "process.events" "processingInstruction.SAX"
[93] "processXInclude" "prod"
[95] "profile" "profvis"
[97] "profvisOutput" "progress_estimated"
[99] "prohibitGeneric" "proj"
[101] "proj4string" "proj4string<-"
[103] "projectExtent" "projection"
[105] "projection<-" "projectRaster"
[107] "promax" "promise_info"
[109] "prompt" "prompt"
[111] "promptClass" "promptData"
[113] "promptImport" "promptMethods"
[115] "promptPackage" "prop.table"
[117] "prop.test" "prop.trend.test"
[119] "proto" "prototype"
[121] "provideDimnames" "prune"
[123] "prune.rpart"
> # find(what, mode = "any", numeric = FALSE, simple.words = TRUE)
> find(what = "ggplot", mode = "function")
[1] "package:ggplot2"
citation
cite
data
データセットの読み込み
Arguments
- ...
- list
- package
- lib.loc
- verbose
- envir
> data()
download.file
インターネットを通じてファイルをダウンロード
Arguments
- url... 対象とするURLを文字列で与える
- destfile... 保存先のファイル名を指定する
- method
- quiet... 実行経過や結果についての出力を行うか否か
- mode...
- cacheOK
- extra
> download.file(url, destfile, method, quiet = FALSE, mode = "w",
+ cacheOK = TRUE,
+ extra = getOption("download.file.extra"))
methods
S3メソッドにおける総称関数あるいはクラスのリストを出力
> methods(print) %>% .[1:5]
> methods("$")
read.table / read.csv / read.csv2 / read.delim / read.delim2
Rprof
プロファイリング
Arguments
- filename
- append
- interval
- memory.profiling
- gc.profiling
- line.profiling
- numfiles
- bufsize
> Rprof()
> 1 + 1
> Rprof(NULL)
str
オブジェクトの構造を表示する
Arguments
- object... 対象オブジェクト
- max.level... 入れ子で表示する最大数
- vec.len... 表示するベクトルの長さ
- digits.d...
- nchar.max
- give.attr
- give.length
- give.head
- width...
- nest.lev
- indent.str
- comp.str
- no.list
> str(iris)
'data.frame': 150 obs. of 5 variables:
$ Sepal.Length: num 5.1 4.9 4.7 4.6 5 5.4 4.6 5 4.4 4.9 ...
$ Sepal.Width : num 3.5 3 3.2 3.1 3.6 3.9 3.4 3.4 2.9 3.1 ...
$ Petal.Length: num 1.4 1.4 1.3 1.5 1.4 1.7 1.4 1.5 1.4 1.5 ...
$ Petal.Width : num 0.2 0.2 0.2 0.2 0.2 0.4 0.3 0.2 0.2 0.1 ...
$ Species : Factor w/ 3 levels "setosa","versicolor",..: 1 1 1 1 1 1 1 1 1 1 ...
> str(ability.cov, vec.len = 5L, nest.lev = 0)
List of 3
$ cov : num [1:6, 1:6] 24.64 5.99 33.52 6.02 20.75 29.7 ...
..- attr(*, "dimnames")=List of 2
.. ..$ : chr [1:6] "general" "picture" "blocks" "maze" "reading" ...
.. ..$ : chr [1:6] "general" "picture" "blocks" "maze" "reading" ...
$ center: num [1:6] 0 0 0 0 0 0
$ n.obs : num 112
zip
zipアーカイブを作成する
> zip(zipfile, files, flags = "-r9X", extras = "",
+ zip = Sys.getenv("R_ZIPCMD", "zip"))