On Tue, Aug 20, 2013 at 6:00 PM, ivo welch <[email protected]> wrote:
> character string at the end of an existing function, stopifnot(). (2)
> I think "estrings" (that behave like characters but are interpolated
> before printout) are useful in the same way perl interpolated strings
> are useful.
The gsubfn package has string interpolation somewhat like perl.
Preface a function call with fn$ and then back ticks and $ are
interpolated.
library(gsubfn)
fn$identity("pi is $pi")
library(sqldf)
fn$sqldf("select * from BOD where Time > $pi")
fn$stop("class is `class(pi)`")
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