在全球范围内用多种模式替换多种替代品

发布于 2025-01-14 09:56:12 字数 533 浏览 2 评论 0原文

在 R 中，我们可以使用 gsub 将向量中的一种模式全局替换为另一种模式。但是，如果我想用许多模式替换许多模式，我该怎么做呢？例如：-

a <- c("AV. Reg", "AVENUE Reg", "Bld. Aze", "BOUlevard Aze", "Str. Fsd", "Strasse FSD", "R. Ger", "RUE Ger")

现在我想替换以下内容：-

pattern    replacement
AV.        Avenue
AVENUE     Avenue
Bld.       Boulevard
BOUlevard  Boulevard
Str.       Strasse
R.         Rue
RUE        Rue

我可以将 pattern 和 replacement 定义为两个向量并用 替换 pattern全局替换。

提前致谢。

原文

In R, we can use gsub to globally substitute one pattern by another pattern in a vector. However, if I want to substitute many patterns for many pattern, how can I do this. For ex:-

a <- c("AV. Reg", "AVENUE Reg", "Bld. Aze", "BOUlevard Aze", "Str. Fsd", "Strasse FSD", "R. Ger", "RUE Ger")

Now I want to substitute the following :-

pattern    replacement
AV.        Avenue
AVENUE     Avenue
Bld.       Boulevard
BOUlevard  Boulevard
Str.       Strasse
R.         Rue
RUE        Rue

Can I define pattern and replacement as two vectors and substitute pattern by replacement globally.

Thanks in advance.

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鸩远一方 2025-01-21 09:56:12

a <- c("AV. Reg", "AVENUE Reg", "Bld. Aze", "BOUlevard Aze", "Str. Fsd", "Strasse FSD", "R. Ger", "RUE Ger")

pattern <- c("AV\\.","AVENUE","Bld\\.","BOUlevard", "Str\\.","R\\.","RUE")
replacement <- c("Avenue","Avenue","Boulevard","Boulevard","Strasse","Rue","Rue")

for(i in seq(pattern))
  a <- gsub(pattern[i], replacement[i], a)

请注意，\ 是为了转义“.”。特殊字符（您可以检查删除它们后会发生什么）。另外，我改变了你的 BLD。到大厦。因为我猜你的意思是

a <- c("AV. Reg", "AVENUE Reg", "Bld. Aze", "BOUlevard Aze", "Str. Fsd", "Strasse FSD", "R. Ger", "RUE Ger")

pattern <- c("AV\\.","AVENUE","Bld\\.","BOUlevard", "Str\\.","R\\.","RUE")
replacement <- c("Avenue","Avenue","Boulevard","Boulevard","Strasse","Rue","Rue")

for(i in seq(pattern))
  a <- gsub(pattern[i], replacement[i], a)

Note the \ is to escape the "." special character ( you can check what happens if you remove them). Also, I changed your BLD. to Bld. cause I guess that what you meant

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