vim and unrecognized characters

I have a file with some accents, and VIM displays them as "~V" characters. The "od -bc" command tells me the characters are charcode 226. I want to substitute them u开发者_运维问答sing VIM. But I can't get it to match the characters. How can I achieve that?

Optional question: how can I have VIM tell me which charset is used to interpret the current file?

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You can use the following formats, from vim's manual on patterns and regular expressions:

ordinary atom
magic   nomagic matches
\%d \%d match specified decimal character (eg \%d123
\%x \%x match specified hex character (eg \%x2a)
\%o \%o match specified octal character (eg \%o040)
\%u \%u match specified multibyte character (eg \%u20ac)
\%U \%U match specified large multibyte character (eg \%U12345678)

So you should be able to do something like this to replace char 226 with a space globally in the file:

:%s/\%d226/ /g

As for the latter, if you do:

:set encoding

You'll see output like:

encoding=latin1

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One very simple way to deal with such "weird" characters is:

1. select the offending character(s) visually (v)
2. yank it to buffer
3. replace it with: :%s/<ctrl-r>"/something-else/g

where <ctrl-r> is pressing ctrl and letter r - together with " it will copy buffer to command line - effectively putting your offending characters inside of s/// operation.