二項演算子 %in% を改良したかった
%in%をよく使う
iris %>%
filter(Species %in% "setosa") %>%
head
## Sepal.Length Sepal.Width Petal.Length Petal.Width Species
## 1 5.1 3.5 1.4 0.2 setosa
## 2 4.9 3.0 1.4 0.2 setosa
## 3 4.7 3.2 1.3 0.2 setosa
## 4 4.6 3.1 1.5 0.2 setosa
## 5 5.0 3.6 1.4 0.2 setosa
## 6 5.4 3.9 1.7 0.4 setosa
data.table::betweenもよく使う
# rows 4.5 ≤ Petal.Length ≤ 5.5
iris %>%
filter(between(Petal.Length, 4.5, 5.5)) %>%
head
## Sepal.Length Sepal.Width Petal.Length Petal.Width Species
## 1 7.0 3.2 4.7 1.4 versicolor
## 2 6.4 3.2 4.5 1.5 versicolor
## 3 6.9 3.1 4.9 1.5 versicolor
## 4 6.5 2.8 4.6 1.5 versicolor
## 5 5.7 2.8 4.5 1.3 versicolor
## 6 6.3 3.3 4.7 1.6 versicolor
# rows !(4.5 ≤ Petal.Length ≤ 5.5)
iris %>%
filter(!between(Petal.Length, 4.5, 5.5)) %>%
head
## Sepal.Length Sepal.Width Petal.Length Petal.Width Species
## 1 5.1 3.5 1.4 0.2 setosa
## 2 4.9 3.0 1.4 0.2 setosa
## 3 4.7 3.2 1.3 0.2 setosa
## 4 4.6 3.1 1.5 0.2 setosa
## 5 5.0 3.6 1.4 0.2 setosa
## 6 5.4 3.9 1.7 0.4 setosa
排反を取得したいときにこんな感じで書きたくなる
が、エラーを吐かれる
iris %>%
filter(Species !%in% "setosa")
Error: unexpected '!' in:
"iris %>%
filter(Species !"
%in%の背反をとるにはこう書く
iris %>%
filter(!(Species %in% "setosa")) %>%
head
## Sepal.Length Sepal.Width Petal.Length Petal.Width Species
## 1 7.0 3.2 4.7 1.4 versicolor
## 2 6.4 3.2 4.5 1.5 versicolor
## 3 6.9 3.1 4.9 1.5 versicolor
## 4 5.5 2.3 4.0 1.3 versicolor
## 5 6.5 2.8 4.6 1.5 versicolor
## 6 5.7 2.8 4.5 1.3 versicolor
直感的ではない(ように思う)
!%in%を実装したかった
%in%の中身
# バッククオートで囲むと参照できる
`%in%`
## function (x, table)
## match(x, table, nomatch = 0L) > 0L
## <bytecode: 0x7ff2e090e498>
## <environment: namespace:base>
!%in%を素直に試みる
`!%in%` <-
function (x, table){
!match(x, table, nomatch = 0L) > 0L
}
# 関数作成はできる
`!%in%` %>%
print
# 実行はできない
iris %>%
filter(Species !%in% "setosa")
Error: unexpected '!' in:
"iris %>%
filter(Species !"
できなかった
ので、代替品を作っておいた
`%!in%` <-
function (x, table){
!match(x, table, nomatch = 0L) > 0L
}
iris %>%
filter(Species %!in% "setosa") %>%
head
## Sepal.Length Sepal.Width Petal.Length Petal.Width Species
## 1 7.0 3.2 4.7 1.4 versicolor
## 2 6.4 3.2 4.5 1.5 versicolor
## 3 6.9 3.1 4.9 1.5 versicolor
## 4 5.5 2.3 4.0 1.3 versicolor
## 5 6.5 2.8 4.6 1.5 versicolor
## 6 5.7 2.8 4.5 1.3 versicolor
session_info()
## setting value
## version R version 3.2.3 (2015-12-10)
## system x86_64, darwin14.5.0
## ui X11
## language (EN)
## collate en_US.UTF-8
## tz Asia/Tokyo
## date 2016-03-11
##
## package * version date source
## agricolae * 1.2-3 2015-10-06 CRAN (R 3.1.3)
## AlgDesign 1.1-7.3 2014-10-15 CRAN (R 3.1.2)
## assertthat 0.1 2013-12-06 CRAN (R 3.1.0)
## bitops * 1.0-6 2013-08-17 CRAN (R 3.1.0)
## boot 1.3-17 2015-06-29 CRAN (R 3.2.3)
## chron 2.3-47 2015-06-24 CRAN (R 3.1.3)
## cluster 2.0.3 2015-07-21 CRAN (R 3.2.3)
## coda 0.18-1 2015-10-16 CRAN (R 3.1.3)
## codetools 0.2-14 2015-07-15 CRAN (R 3.2.3)
## colorspace 1.2-6 2015-03-11 CRAN (R 3.1.3)
## combinat 0.0-8 2012-10-29 CRAN (R 3.1.0)
## data.table * 1.9.6 2015-09-19 CRAN (R 3.1.3)
## DBI 0.3.1 2014-09-24 CRAN (R 3.1.1)
## deldir 0.1-9 2015-03-09 CRAN (R 3.1.3)
## devtools * 1.9.1 2015-09-11 CRAN (R 3.2.0)
## digest 0.6.8 2014-12-31 CRAN (R 3.1.2)
## doParallel 1.0.10 2015-10-14 CRAN (R 3.1.3)
## doRNG 1.6 2014-03-07 CRAN (R 3.1.2)
## dplyr * 0.4.3 2015-09-01 CRAN (R 3.1.3)
## evaluate 0.8 2015-09-18 CRAN (R 3.1.3)
## foreach * 1.4.3 2015-10-13 CRAN (R 3.1.3)
## formatR 1.2.1 2015-09-18 CRAN (R 3.1.3)
## ggplot2 * 2.0.0 2015-12-18 CRAN (R 3.2.3)
## gridExtra * 2.0.0 2015-07-14 CRAN (R 3.1.3)
## gtable * 0.1.2 2012-12-05 CRAN (R 3.1.0)
## httr 1.0.0 2015-06-25 CRAN (R 3.1.3)
## iterators 1.0.8 2015-10-13 CRAN (R 3.1.3)
## jsonlite 0.9.19 2015-11-28 CRAN (R 3.1.3)
## klaR 0.6-12 2014-08-06 CRAN (R 3.1.1)
## knitr * 1.11 2015-08-14 CRAN (R 3.2.3)
## lattice 0.20-33 2015-07-14 CRAN (R 3.2.3)
## lazyeval 0.1.10 2015-01-02 CRAN (R 3.1.2)
## LearnBayes 2.15 2014-05-29 CRAN (R 3.1.0)
## lubridate * 1.5.0 2015-12-03 CRAN (R 3.2.3)
## magrittr * 1.5 2014-11-22 CRAN (R 3.1.2)
## MASS * 7.3-45 2015-11-10 CRAN (R 3.2.3)
## Matrix 1.2-3 2015-11-28 CRAN (R 3.2.3)
## memoise 0.2.1 2014-04-22 CRAN (R 3.1.0)
## munsell 0.4.2 2013-07-11 CRAN (R 3.1.0)
## nlme 3.1-122 2015-08-19 CRAN (R 3.2.3)
## pforeach * 1.3 2015-12-21 Github (hoxo-m/pforeach@2c44f3b)
## pkgmaker 0.22 2014-05-14 CRAN (R 3.1.3)
## plyr * 1.8.3 2015-06-12 CRAN (R 3.1.3)
## R6 2.1.1 2015-08-19 CRAN (R 3.1.3)
## RColorBrewer * 1.1-2 2014-12-07 CRAN (R 3.1.2)
## Rcpp 0.12.2 2015-11-15 CRAN (R 3.1.3)
## RCurl * 1.95-4.7 2015-06-30 CRAN (R 3.1.3)
## registry 0.3 2015-07-08 CRAN (R 3.1.3)
## reshape2 * 1.4.1 2014-12-06 CRAN (R 3.1.2)
## rJava * 0.9-7 2015-07-29 CRAN (R 3.1.3)
## rngtools 1.2.4 2014-03-06 CRAN (R 3.1.2)
## scales * 0.3.0 2015-08-25 CRAN (R 3.1.3)
## slackr * 1.3.1.9001 2015-12-07 Github (hrbrmstr/slackr@27f777e)
## sp 1.2-1 2015-10-18 CRAN (R 3.2.3)
## spdep 0.5-92 2015-12-22 CRAN (R 3.2.3)
## stringi 1.0-1 2015-10-22 CRAN (R 3.1.3)
## stringr * 1.0.0 2015-04-30 CRAN (R 3.1.3)
## tidyr * 0.3.1 2015-09-10 CRAN (R 3.2.0)
## xlsx * 0.5.7 2014-08-02 CRAN (R 3.1.1)
## xlsxjars * 0.6.1 2014-08-22 CRAN (R 3.1.1)
## xtable 1.8-0 2015-11-02 CRAN (R 3.1.3)