[R] FW: impossible escape?

From: Charles Annis, P.E. <Charles.Annis_at_statisticalengineering.com>
Date: Wed 11 Oct 2006 - 17:53:23 GMT


I've been using cat() but somehow never got the bigger picture.


Charles Annis, P.E.

Charles.Annis@StatisticalEngineering.com phone: 561-352-9699
eFax: 614-455-3265

-----Original Message-----
From: Marc Schwartz [mailto:MSchwartz@mn.rr.com] Sent: Wednesday, October 11, 2006 1:45 PM To: Charles.Annis@statisticalengineering.com Cc: r-help@stat.math.ethz.ch
Subject: Re: [R] impossible escape?

On Wed, 2006-10-11 at 13:30 -0400, Charles Annis, P.E. wrote:
> Greetings:
> I've searched the R archives with no luck.
> I want to print this to the screen as part of on-screen instructions as an
> example:
> default.FACTOR.labels <- c("Probe1", "Probe2", "Probe3")
> I can't seem to trick gsub()
> gsub("'", "\"", "default.FACTOR.labels <- c('Probe1', 'Probe2',
> [1] "default.FACTOR.labels <- c(\"Probe1\", \"Probe2\", \"Probe3\"))"
> ^ ^ ^ ^ ^ ^

> which gives me \" rather than "
> Is it possible to escape the " character?
> Thanks.
> Charles Annis, P.E.

You don't need the gsub() and you want to use cat() to output the text:

> cat("default.FACTOR.labels <- c(\"Probe1\", \"Probe2\", \"Probe3

default.FACTOR.labels <- c("Probe1", "Probe2", "Probe3")

cat() will properly interpret and output the escaped characters. The newline character "\n" will return the cursor to the next line, so that the R prompt is not at the end of the last line output.

HTH, Marc Schwartz

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