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str_replace r 在 [問題] R 可否replace '.' - 看板R_Language - 批踢踢實業坊 的推薦與評價


作者girl5566 (5566520)
看板R_Language
標題[問題] R 可否replace '.'
時間Wed Feb 24 22:15:16 2016

文章分類提示:
- 問題: 當你想要問問題時，請使用這個類別

[問題類型]:
程式諮詢(我想用R 做某件事情，但是我不知道要怎麼用R 寫出來)

[軟體熟悉度]:
新手(沒寫過程式，R 是我的第一次)

[問題敘述]:

想詢問在R中可否進行"."的取代

目前嘗試過 sub 和str_replace 皆無法取代"."

[程式範例]:

> a="123.456"

> sub(".","_",a)
[1] "_23.456"

> library(stringr)
Warning message:
package ‘stringr’ was built under R version 3.2.3
> a="123.456"
> str_replace(a,".","_")
[1] "_23.456"

[環境敘述]:

R 3.2.2 Win7 64bit

[關鍵字]:

string replace

--
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※ 文章網址: https://www.ptt.cc/bbs/R_Language/M.1456323318.A.C8E.html
推 HeroNoah: sub("\\.", "_", a) 02/24 22:45
→ Wush978: 或是加上參數： fixed = TRUE 02/24 23:38
→ bowin: gsub("\\.", replacement = "_", a) 02/25 00:09
→ girl5566: 收到 感謝 原來.是特殊字元 02/25 00:23
→ celestialgod: 在regExp視作任意字元 02/25 10:08






... <看更多>

str_replace r 在 Unexpected behaviour when using str_replace() in string with ... 的推薦與評價

str_replace seems to randomly replace the first character when trying to replace a "." (might be piping related?) strtest<-"TOP40TR. ... <看更多>

str_replace r 在 Replace text within all cells of a specific column of a data ... 的推薦與評價

I knew that stringr::str_replace() is awesome for this sort of thing, but I hadn't quite grasped how I could target specific columns with it ... ... <看更多>

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