[英]how to overwrite a html file in R
我正在嘗試將HTML文件中的電子郵件地址替換為ANTI SPAM格式,然后再次將其導出為nospam.html文件。 我嘗試使用gsub()函數執行此操作,但是它似乎不起作用。 有什么問題? 謝謝!!!
datei <- scan("https://isor.univie.ac.at/about-us/People.html", sep = "\n", what= "character")
#pattern.email <- "[a-z]+[.]+[a-z]+?[@]+[a-z]+"
reg.email <- "\\<[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,}\\>" #works
stelle.email <-gregexpr(reg.email, datei, ignore.case = TRUE) #works
unlist(stelle.email)
res.email<- regmatches(datei, stelle.email)
datei2<-gsub(reg.email, "vornameDOTnameNO-SPAMunivieDOTacDOTat", x = datei)
write(datei2, file = "nospam.html")
知道regmatches
(用於提取匹配的子字符串)還具有伴隨的regmatches<-
函數(用於替換匹配的子字符串),可能會regmatches
。 請參閱?regmatches
。
因此,不需要gsub
,只需:
datei <- scan("https://isor.univie.ac.at/about-us/People.html", sep = "\n", what= "character")
# Read 481 items
reg.email <- "\\<[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,}\\>" #works
stelle.email <- gregexpr(reg.email, datei, ignore.case = TRUE) #works
# for proof, first look at a substring with a "known" email:
substr(datei[268], 236, 281)
### the only new/different line of code, remove your gsub
regmatches(datei, stelle.email) <- "vornameDOTnameNO-SPAMunivieDOTacDOTat"
# now look at the same portion of that one substring, now updated
substr(datei[268], 236, 281)
write(...)
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