## Warning in library(package, lib.loc = lib.loc, character.only = TRUE,
## logical.return = TRUE, : there is no package called 'agricolae'## Warning in library(package, lib.loc = lib.loc, character.only = TRUE,
## logical.return = TRUE, : there is no package called 'slackr'%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 setosadata.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: 0x7ff0c30397c0>
## <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 versicolorsession_info()## setting value
## version R version 3.5.0 (2018-04-23)
## system x86_64, darwin15.6.0
## ui X11
## language (EN)
## collate en_US.UTF-8
## tz Australia/Brisbane
## date 2018-05-16
##
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## pforeach * 1.3 2018-04-25 Github (hoxo-m/pforeach@2c44f3b)
## pillar 1.2.1 2018-02-27 CRAN (R 3.5.0)
## pkgconfig 2.0.1 2017-03-21 CRAN (R 3.5.0)
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