[R] How do I parse embedded quotes?

Andre Mikulec andre_mikulec at hotmail.com
Thu Jan 28 02:54:34 CET 2016

That jogged my my brain.

Then, I realized that I really want to parse this.

> "\"c(list(\"c('a','b'),c('c','d'))\")\""
[1] "\"c(list(\"c('a','b'),c('c','d'))\")\""

Then, I remembered that parse() has an opposite: deparse().
So I started to work backwards.

I ended up with this.

> deparse(deparse("\"c(list(\"c('a','b'),c('c','d'))\")\""))
[1] "\"\\\"\\\\\\\"c(list(\\\\\\\"c('a','b'),c('c','d'))\\\\\\\")\\\\\\\"\\\"\""

That is too hot to handle.
I will re-start programming in a different direction.

But, again, thanks for the help.

Andre Mikulec
Andre_Mikulec at Hotmail.com

> Subject: Re: [R] How do I parse embedded quotes?
> To: andre_mikulec at hotmail.com; r-help at r-project.org
> From: murdoch.duncan at gmail.com
> Date: Tue, 26 Jan 2016 12:29:27 -0500
> On 26/01/2016 10:44 AM, Andre Mikulec wrote:
>> I want embedded quotes to be parsed. I can not figure out hot to do that. I want to this to be parsable.
>> "'"a"'"
>> In a simpler case, "'a'" is parsable.
>>> eval(parse(text="\"'a'\""))
>> [1] "'a'"
>> But I want to parse embedded quotes
>> So, I want to parse '"a"' and not just 'a'
>>> eval(parse(text="\"'\"a\"'\""))
>> Error in parse(text = "\"'\"a\"'\"") : <text>:1:4: unexpected symbol
>> 1: "'"a
>> I keep getting that(above) error.
>> Any ideas would much be appreciated.
> It is usually helpful to print strings using cat(), so that the escapes
> and quotes around it don't show. With your string that gives the
> error, I see
> "'"a"'"
> That's not legal R source, because the double quotes that are within the
> string are not escaped. To be legal R code you would need
> "'\"a\"'"
> and to get that you need the original string to look like
> "\"'\\\"a\\\"'\""
> Duncan Murdoch

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