[R] R as a programming language

[Gabor Grothendieck]

On Nov 8, 2007 1:26 PM, Barry Rowlingson <b.rowlingson at lancaster.ac.uk> wrote:
> hadley wickham wrote:
>
> > You're assuming an automatic cast from numbers into strings?  What if
> > a + "4" threw an error?
>
>  What's wrong with commas anyway when using cat():
>
>  > cat("x is ",x,' and y is ',y,'\n',sep='')
>  x is 1 and y is 2
>
>  and there's always sprintf() for those moments when you want neat
> formatting.
>
>  Is it just me who thinks it's odd that in a language that is umpteen
> years old we are still discussing the fundamentals of what essentially
> makes up the 'hello world' example?

The gsubfn package lets you do quasi-perl style
interpolation on the arguments of a function by
prefacing the function with fn$ like this:

library(gsubfn)
fn$cat("pi = $pi, e = `exp(1)`\n")