windows - R:即使指定编码也无法读取unicode文本文件

Question

我在 Windows 7 32 位上使用 R 3.1.1。我在阅读一些我想对其执行文本分析的文本文件时遇到了很多问题。根据 Notepad++，这些文件使用 "UCS-2 Little Endian" 编码。 (grepWin，一个名字说明一切的工具，它说文件是“Unicode”。)

问题是，即使指定了编码，我似乎也无法读取文件。 (这些字符属于标准的西类牙拉丁语集 -ñáó-，应该可以使用 CP1252 或类似的东西轻松处理。)

> Sys.getlocale()
[1] "LC_COLLATE=Spanish_Spain.1252;LC_CTYPE=Spanish_Spain.1252;LC_MONETARY=Spanish_Spain.1252;LC_NUMERIC=C;LC_TIME=Spanish_Spain.1252"
> readLines("filename.txt")
 [1] "ÿþE" ""    ""    ""    ""   ...
> readLines("filename.txt",encoding="UTF-8")
 [1] "\xff\xfeE" ""          ""          ""          ""    ...
> readLines("filename.txt",encoding="UCS2LE")
 [1] "ÿþE" ""    ""    ""    ""    ""    ""     ...
> readLines("filename.txt",encoding="UCS2")
 [1] "ÿþE" ""    ""    ""    ""    ...

有什么想法吗？

谢谢!!

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编辑:“UTF-16”、“UTF-16LE”和“UTF-16BE”编码同样失败

Answer 1

仔细阅读文档后，我找到了问题的答案。

readLines 的encoding 参数只应用于参数输入字符串。文档说:

encoding to be assumed for input strings. It is used to mark character strings as known to be in Latin-1 or UTF-8: it is not used to re-encode the input. To do the latter, specify the encoding as part of the connection con or via options(encoding=): see the examples. See also ‘Details’.

读取具有不常见编码的文件的正确方法是，

filetext <- readLines(con <- file("UnicodeFile.txt", encoding = "UCS-2LE"))
close(con)