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I want to print to the screen double quotes (") in R, but it is not working. Typical regex escape characters are not working:
> print('"')
[1] "\""
> print('\"')
[1] "\""
> print('/"')
[1] "/\""
> print('`"')
[1] "`\""
> print('"xml"')
[1] "\"xml\""
> print('\"xml\"')
[1] "\"xml\""
> print('\\"xml\\"')
[1] "\\\"xml\\\""
I want it to return:
" "xml" "
which I will then use downstream.
Any ideas?
817
With an escape character, however, adding a double quote inside your string is easy, you simply prepend the double quote with the backslash.
\" - escape sequence Since printf uses ""(double quotes) to identify starting and ending point of a message, we need to use \" escape sequence to print the double quotes.
quote() returns an expression: an object that represents an action that can be performed by R. (Unfortunately expression() does not return an expression in this sense. Instead, it returns something more like a list of expressions. See parsing and deparsing for more details.)
To add single quotes to strings in an R data frame column, we can use paste0 function. This will cover the strings with single quotes from both the sides but we can add them at the initial or only at the last position.
Use cat:
cat("\" \"xml\" \"")
OR
cat('" "','xml','" "')
Output:
" "xml" "
Alternative using noqoute:
noquote(" \" \"xml\" \" ")
Output :
" "xml" "
Another option using dQoute:
dQuote(" xml ")
Output :
"“ xml ”"
With the help of the print parameter quote:
print("\" \"xml\" \"", quote = FALSE)
> [1] " "xml" "
or
cat('"')
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