pryr: Tools for Computing on the Language
> library(pryr)
バージョン: 0.1.2
| . |
|---|
| %<a-% Create an active binding. |
| %<c-% Create a constant (locked) binding. |
| %<d-% Create an delayed binding. |
| bytes Print the byte-wise representation of a value |
| call_tree Display a call (or expression) as a tree. |
| compose Compose multiple functions |
| dots Capture unevaluated dots. |
| enclosing_env Find the environment that encloses of a |
| function. |
| explicit Tools for making promises explicit |
| f A compact syntax for anonymous functions. |
| fget Find a function with specified name. |
| find_funs Find functions matching criteria. |
| find_uses Find all functions in that call supplied |
| functions. |
| ftype Determine function type. |
| is_active_binding Active binding info |
| is_promise Promise info |
| make_call Make and evaluate calls. |
| make_function Make a function from its components. |
| mem_change Determine change in memory from running code |
| mem_used How much memory is currently used by R? |
| method_from_call Given a function class, find correspoding S4 |
| method |
| modify_call Modify the arguments of a call. |
| modify_lang Recursively modify a language object |
| object_size Compute the size of an object. |
| otype Determine object type. |
| parent_promise Find the parent (first) promise. |
| parenv Get parent/ancestor environment |
| parenvs Given an environment or object, return an |
| 'envlist' of its parent environments. |
| partial Partial apply a function, filling in some |
| arguments. |
| rebind Rebind an existing name. |
| rls Recursive ls. |
| sexp_type Inspect internal attributes of R objects. |
| show_c_source Find C source code for internal R functions |
| standardise_call Standardise a function call |
| subs A version of substitute that works in the |
| global environment. |
| substitute_q A version of substitute that evaluates its |
| first argument. |
| track_copy Track if an object is copied |
| unenclose Unenclose a closure. |
| uneval Capture the call associated with a promise. |
| where Find where a name is defined. |
| 関数名 | 概略 |
|---|---|
%<a-% |
Create an active binding. |
%<c-% |
Create a constant (locked) binding. |
%<d-% |
Create an delayed binding. |
bytes |
Print the byte-wise representation of a value |
call_tree |
Display a call (or expression) as a tree. |
compose |
Compose multiple functions |
dots |
Capture unevaluated dots. |
enclosing_env |
Find the environment that encloses of a function. |
explicit |
Tools for making promises explicit |
f |
A compact syntax for anonymous functions. |
fget |
Find a function with specified name. |
find_funs |
Find functions matching criteria. |
find_uses |
Find all functions in that call supplied functions. |
ftype |
Determine function type. |
is_active_binding |
Active binding info |
is_promise |
Promise info |
make_call |
Make and evaluate calls. |
make_function |
Make a function from its components. |
mem_change |
Determine change in memory from running code |
mem_used |
How much memory is currently used by R? |
method_from_call |
Given a function class, find correspoding S4 method |
modify_call |
Modify the arguments of a call. |
modify_lang |
Recursively modify a language object |
object_size |
Compute the size of an object. |
otype |
Determine object type. |
parent_promise |
Find the parent (first) promise. |
parenv |
Get parent/ancestor environment |
parenvs |
Given an environment or object, return an 'envlist' of its parent environments. |
partial |
Partial apply a function, filling in some arguments. |
rebind |
Rebind an existing name. |
rls |
Recursive ls. |
sexp_type |
Inspect internal attributes of R objects. |
show_c_source |
Find C source code for internal R functions |
standardise_call |
Standardise a function call |
subs |
A version of substitute that works in the global environment. |
substitute_q |
A version of substitute that evaluates its first argument. |
track_copy |
Track if an object is copied |
unenclose |
Unenclose a closure. |
uneval |
Capture the call associated with a promise. |
where |
Find where a name is defined. |
bytes
> x <- y <- z <- "\u9b3c"
> Encoding(y) <- "bytes"
> Encoding(z) <- "latin1"
> print(x); print(y); print(z)
[1] "鬼"
[1] "\\xe9\\xac\\xbc"
[1] "鬼"
> bytes(x); bytes(y); bytes(z)
[1] "E9 AC BC"
[1] "E9 AC BC"
[1] "E9 AC BC"
> bits(x); bits(y); bits(z)
[1] "11101001 10101100 10111100"
[1] "11101001 10101100 10111100"
[1] "11101001 10101100 10111100"
make_function
関数の定義を行う
Arguments
- args
- body
- env
> g <- make_function(alist(x = ), quote(x + 3))
> g(x = 1)
[1] 4
mem_used
メモリー使用量
> mem_used()
314 MB
otype
オブジェクトの型を定義する
> otype(data.frame())
[1] "S3"
> otype(1:10)
[1] "base"
> otype(mean)
[1] "base"
> otype("ggplot2")
[1] "base"
is_promise
> x <- 10
> is_promise(x)
[1] FALSE
parenv
環境のスコープ
Arguments
- env
- n
> parenv()
<environment: 0x1528c8d80>
parenvs
> parenvs(all = TRUE)
label name
1 <environment: 0x11e6d1870> ""
2 <environment: 0x1528c8d80> ""
3 <environment: namespace:Rgitbook> ""
4 <environment: 0x10fea6a30> "imports:Rgitbook"
5 <environment: namespace:base> ""
6 <environment: R_GlobalEnv> ""
7 <environment: package:tidyjson> "package:tidyjson"
8 <environment: package:stringi> "package:stringi"
9 <environment: package:RJSONIO> "package:RJSONIO"
10 <environment: package:random> "package:random"
11 <environment: package:purrr> "package:purrr"
12 <environment: package:plan> "package:plan"
13 <environment: package:rpart> "package:rpart"
14 <environment: package:boot> "package:boot"
15 <environment: package:foreign> "package:foreign"
16 <environment: package:lattice> "package:lattice"
17 <environment: package:pacman> "package:pacman"
18 <environment: package:mime> "package:mime"
19 <environment: package:jsonlite> "package:jsonlite"
20 <environment: package:githug> "package:githug"
21 <environment: package:feather> "package:feather"
22 <environment: package:dpmr> "package:dpmr"
23 <environment: package:digest> "package:digest"
24 <environment: package:data.table> "package:data.table"
25 <environment: package:chunked> "package:chunked"
26 <environment: package:rgeos> "package:rgeos"
27 <environment: package:lawn> "package:lawn"
28 <environment: package:geosphere> "package:geosphere"
29 <environment: package:rstanarm> "package:rstanarm"
30 <environment: package:R6> "package:R6"
31 <environment: package:pryr> "package:pryr"
32 <environment: package:profvis> "package:profvis"
33 <environment: package:covr> "package:covr"
34 <environment: package:xts> "package:xts"
35 <environment: package:zoo> "package:zoo"
36 <environment: package:timeSeries> "package:timeSeries"
37 <environment: package:timeDate> "package:timeDate"
38 <environment: package:RNeo4j> "package:RNeo4j"
39 <environment: package:RGA> "package:RGA"
40 <environment: package:mice> "package:mice"
41 <environment: package:Rcpp> "package:Rcpp"
42 <environment: package:downscale> "package:downscale"
43 <environment: package:dismo> "package:dismo"
44 <environment: package:raster> "package:raster"
45 <environment: package:celestial> "package:celestial"
46 <environment: package:RANN> "package:RANN"
47 <environment: package:tidyr> "package:tidyr"
48 <environment: package:fuzzyjoin> "package:fuzzyjoin"
49 <environment: package:readr> "package:readr"
50 <environment: package:dplyr> "package:dplyr"
51 <environment: package:V8> "package:V8"
52 <environment: package:shinygadgets> "package:shinygadgets"
53 <environment: package:XML2R> "package:XML2R"
54 <environment: package:XML> "package:XML"
55 <environment: package:trelloR> "package:trelloR"
56 <environment: package:tableHTML> "package:tableHTML"
57 <environment: package:rvest> "package:rvest"
58 <environment: package:xml2> "package:xml2"
59 <environment: package:selectr> "package:selectr"
60 <environment: package:htmltidy> "package:htmltidy"
61 <environment: package:tutorial> "package:tutorial"
62 <environment: package:tidyxl> "package:tidyxl"
63 <environment: package:pbapply> "package:pbapply"
64 <environment: package:ndjson> "package:ndjson"
65 <environment: package:gsubfn> "package:gsubfn"
66 <environment: package:proto> "package:proto"
67 <environment: package:formatR> "package:formatR"
68 <environment: package:forcats> "package:forcats"
69 <environment: package:diffobj> "package:diffobj"
70 <environment: package:assertthat> "package:assertthat"
71 <environment: package:assertive> "package:assertive"
72 <environment: package:spex> "package:spex"
73 <environment: package:postGIStools> "package:postGIStools"
74 <environment: package:geographr> "package:geographr"
75 <environment: package:png> "package:png"
76 <environment: package:sp> "package:sp"
77 <environment: package:mapproj> "package:mapproj"
78 <environment: package:maps> "package:maps"
79 <environment: package:timevis> "package:timevis"
80 <environment: package:minimap> "package:minimap"
81 <environment: package:magick> "package:magick"
82 <environment: package:ggRandomForests> "package:ggRandomForests"
83 <environment: package:randomForestSRC> "package:randomForestSRC"
84 <environment: package:ggalluvial> "package:ggalluvial"
85 <environment: package:ensurer> "package:ensurer"
86 <environment: package:testwhat> "package:testwhat"
87 <environment: package:checkr> "package:checkr"
88 <environment: package:colormap> "package:colormap"
89 <environment: package:hms> "package:hms"
90 <environment: package:anytime> "package:anytime"
91 <environment: package:dummies> "package:dummies"
92 <environment: package:survey> "package:survey"
93 <environment: package:survival> "package:survival"
94 <environment: package:Matrix> "package:Matrix"
95 <environment: package:grid> "package:grid"
96 <environment: package:janitor> "package:janitor"
97 <environment: package:shinyLP> "package:shinyLP"
98 <environment: package:miniUI> "package:miniUI"
99 <environment: package:Rgitbook> "package:Rgitbook"
100 <environment: 0x10a0fe878> "tools:rstudio"
101 <environment: package:stats> "package:stats"
102 <environment: package:graphics> "package:graphics"
103 <environment: package:grDevices> "package:grDevices"
104 <environment: package:utils> "package:utils"
105 <environment: package:datasets> "package:datasets"
106 <environment: package:roracle> "package:roracle"
107 <environment: package:testthat> "package:testthat"
108 <environment: package:devtools> "package:devtools"
109 <environment: package:remoji> "package:remoji"
110 <environment: package:git2r> "package:git2r"
111 <environment: package:ggplot2> "package:ggplot2"
112 <environment: package:magrittr> "package:magrittr"
113 <environment: package:knitr> "package:knitr"
114 <environment: 0x1031fe6b0> "JapanEnv"
115 <environment: package:methods> "package:methods"
116 <environment: 0x103975b50> "Autoloads"
117 <environment: base> ""
118 <environment: R_EmptyEnv> ""
track_copy
> a <- 1:5
> track_a <- track_copy(a)
> track_a()
rebind
永続代入
> a <- 1
> rebind("a", 2)
> a
[1] 2
rls
Arguments
- env... 検索を行う環境
- all.names... すべてのオブジェクトを表示するか（隠しオブジェクトを含めるか）
> rls()
[[1]]
[1] "a" "atlas.data" "batting_tbl"
[4] "board" "by_cyl" "cc"
[7] "compare" "contacts" "ct"
[10] "d" "d1" "d2"
[13] "data" "data.file" "df"
[16] "DF.dummy" "e" "examples"
[19] "exdoc" "f" "f1"
[22] "f2" "fit" "fs"
[25] "fun1" "fun2" "g"
[28] "ga_meta" "hui" "imp"
[31] "Lines" "messy" "models"
[34] "my_add" "obs" "occupancy"
[37] "opb" "opts" "p"
[40] "pat" "plays_by_year" "pts"
[43] "r" "r1" "r2"
[46] "res" "s1" "s2"
[49] "states" "sub_misspellings" "svgdoc"
[52] "test" "testit" "thresh"
[55] "track_a" "train" "txt"
[58] "words" "x" "X"
[61] "xts.ts" "xy" "y"
[64] "Y" "y1" "y2"
[67] "z" "zoo.ts"
[[2]]
[1] "..." "bib" "bibs"
[4] "clean" "dir" "existing"
[7] "finfo" "j" "knitenv"
[10] "last.R.version" "last.run" "log.dir"
[13] "log.ext" "newfiles" "oldwd"
[16] "referenceFiles" "referenceFilesPos" "rmdinfo"
[19] "rmds" "statusfile"
uneval
> uneval
where
Arguments
- name
- env
> x <- 1
> where("x")
<environment: 0x11e6d1870>
> where("t.test")
<environment: package:stats>
attr(,"name")
[1] "package:stats"
attr(,"path")
[1] "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/stats"
> where("mean")
<environment: namespace:base>
> where("where")
<environment: package:pryr>
attr(,"name")
[1] "package:pryr"
attr(,"path")
[1] "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/pryr"