Error in gsub is too long with Arabic language in R - r

Question

I am doing text mining in R with Arabic language
And use gsub function but I got an error as shown here
Error in gsub("^\\x{0627}\\x{0644}(?=\\p{L})", "", x, perl = TRUE) :
invalid regular expression '^\x{0627}\x{0644}(?=\p{L})'
In addition: Warning message:
In gsub("^\\x{0627}\\x{0644}(?=\\p{L})", "", x, perl = TRUE) :
PCRE pattern compilation error
'character value in \x{} or \o{} is too large'
at '}\x{0644}(?=\p{L})'
here is my code
x<-("الوطن")
# Remove leading alef lam with optional leading waw
m <- gsub('^\\x{0627}\\x{0644}(?=\\p{L})', '', x, perl = TRUE)
anyone can help me ?

Answer 1

Finally I solved the problem ,
the problem is : when I import data in Arabic language as csv then apply gsub I get the error
Error in gsub("^\\x{0627}\\x{0644}(?=\\p{L})", "", x, perl = TRUE) :
invalid regular expression '^\x{0627}\x{0644}(?=\p{L})'
In addition: Warning message:
In gsub("^\\x{0627}\\x{0644}(?=\\p{L})", "", x, perl = TRUE) :
PCRE pattern compilation error
'character value in \x{} or \o{} is too large'
at '}\x{0644}(?=\p{L})'
I figure out that I need to save the data with encode= UTF-8
then read it also with encode= UTF-8 Then change the Local .
like this code :
Sys.setlocale("LC_CTYPE","arabic")
[1] "Arabic_Saudi Arabia.1256"
> write.csv(x, file = "x.csv" , fileEncoding = "UTF-8")
y<-read.csv("C:/Users/Documents/x.csv",encoding ="UTF-8")
> Sys.setlocale("LC_CTYPE","arabic")
[1] "Arabic_Saudi Arabia.1256"

Answer 2

it seems to me the only problem is your quotation marks:
> x <- "الوطن"
> gsub('^\\x{0627}\\x{0644}(?=\\p{L})', '', x, perl = TRUE)
[1] "وطن"
also, check for your OS locale as I've experienced some similar issues when trying to process Hebrew text while my Windows locale was set to US.