用元字符在R中拆分 [英] strsplit in R with a metacharacter

问题描述

我有大量的数据，其中的定界符是反斜杠.我正在R中处理它，而且由于反斜杠是一个元字符，因此很难找到如何分割字符串的方法.例如，一个字符串如下所示:

I have a large amount of data where the delimiter is a backslash. I'm processing it in R and I'm having a hard time finding how to split the string since the backslash is a metacharacter. For example, a string would look like this:

1128\0019\XA5\E2R\366\00=15

，我想将其沿\字符分割，但是当我运行strsplit命令时:

and I want to split it along the \ character, but when I run the strsplit command:

strsplit(tempStr, "\\")
Error in strsplit(tempStr, "\\") : 
  invalid regular expression '\', reason 'Trailing backslash'

当我尝试使用"fixed"选项时，它无法运行，因为它在反斜杠后期望有一些东西:

When I try to used the "fixed" option, it does not run because it is expecting something after the backslash:

strsplit(tempStr, "\", fixed = TRUE)

不幸的是，我无法使用其他程序对数据进行预处理，因为该数据是每天生成的.

Unfortunately, I can't preprocess the data with another program because the data is generated daily.

推荐答案

您的代码行是(尽管您没有明确说明):

Your line of code is (though you don't say it explicitly):

strsplit(tempStr, "\\")

并且应该是

strsplit(tempStr, "\\\\")

这将被读为"\\"，正则表达式将被理解为"\".

This will be read as "\\", which the regular expression will understand as a "\".

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