[R] Escape sequence in eval ()

[Jim Holtman]

get(a)[[b]][[c]]

with 

b <- "2011-01-02"

Sent from my iPad

On Jun 15, 2011, at 9:58, "Franc Lucas" <Franc.Lucas at web.de> wrote:

> 
>   Hello,
>   I am wondering how to get the quotation marks into a variable expression. I
>   can't escape it with the backslash \ ...
>   Example:
>   I can access my data frame via
>   TABLE$"2011-01-02"$columnD
>   Now I want to do this automatically.. (with a for loop)..
>   a <- TABLE
>   b <- " \"2011-01-02\" "
>   c <- "columnD"
>   acessmytable <- paste(a,b,c, sep="$")
>   parse(text="accessmytable")
>   eval(accessmytable)
>   It will return
>   [1] "TABLE$\"2011-01-02\"$close"
>   but I need
>   TABLE$"2011-01-02"$close
>   I highly appreciate your help!
>   Sincerely,
>   Franc
>   BS Student, University of Mannheim
> 
>   Schon gehört? WEB.DE hat einen genialen Phishing-Filter in die
>   Toolbar eingebaut! [1]http://produkte.web.de/go/toolbar
> 
> References
> 
>   1. http://produkte.web.de/go/toolbar
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