Michael Dewey [EMAIL PROTECTED] writes:
Something about the way R processes backslashes is defeating me.
Perhaps this is because I have only just started using R for text processing.
I would like to change occurrences of the ampersand into ampersand
preceded by a backslash.
temp - R D
sub(, \, temp)
[1] R D
sub(, \\, temp)
[1] R D
sub(, \\\, temp)
[1] R D
sub(, , temp)
[1] R \\ D
So I can get zero, or two backslashes, but not one. I am sure this is
really simple but I did not find the answer by doing, for example ?regexp
or ?Quotes
None of those result strings have two backslashes!
Hint:
nchar(R \\ D)
[1] 6
and ?Quotes tellse the entire story.
--
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