I have the following regular expression in an R script:
grepl("xe9", "MY TEXT", fixed = FALSE, ignore.case = TRUE, perl = FALSE)
我有以下错误:
Error in grepl("xe9", "MY TEXT", fixed = FALSE, ignore.case = TRUE, :
regular expression is invalid in this locale
“xe9”是“é”的单一编码,从档案中读作。
How can I fix this? Additionally, is there a useful resource on locales w.r.t regular expression in R?
I don t know why @joran didn t just post this as an answer:
grepl("\xe9", c("MY TEXT", "é"), fixed = FALSE, ignore.case = TRUE, perl = FALSE)
#[1] FALSE TRUE
I can see some duplicate characters in Unicode. For example, the character C can be represented by the code points U+0043 and U+0421. Why is this so?
Need to extract the initial character from a Korean word in MS-Excel and MS-Access. When I use Left("한글",1) it will return the first syllable i.e 한, what I need is the initial character i.e ㅎ . Is ...
I execute following code on windows xp and python 2.6.4 But it show IOError. How to open file whose name has utf-8 codec. >>> open( unicode( 한글.txt , euc-kr ).encode( utf-8 ) ) Traceback ...
I used lxml to parse some web page as below: >>> doc = lxml.html.fromstring(htmldata) >>> element in doc.cssselect(sometag)[0] >>> text = element.text_content() >>>...
The XML specification lists a bunch of Unicode characters that are either illegal or "discouraged". Given a string, how can I remove all illegal characters from it? I came up with the following ...
I am using Sandcastle Helpfile Builder to produce a helpfile (.chm). The project is a .shfbproj file, which is XML format, works with msbuild. I want to automatically update the Footer text that ...
When I open a multi-byte file, I get this:
• 如何在java印刷0x13Unicode nature?