[R] Function call on every prompt

[Marc Schwartz]

On Nov 19, 2010, at 9:23 AM, Barry Rowlingson wrote:

> Someone on stackoverflow.com was wondering how to display the current
> time in the R prompt. I could have swore there was a mechanism for
> hooking a function into R such that it is was called before the ">"
> prompt was given, but no amount of searching in R's docs, R's source,
> or RSiteSearch can find it.
> 
> I've searched for 'hook', 'event', 'signal', and various combinations
> of those with 'console', 'prompt', 'after' and 'before' with no joy.
> I'm sure other people have asked this on R-help before, but I can't
> find those messages either.
> 
> Have I been hallucinating or is my search-fu week this Friday?
> 
> Barry


Baz,

What's wrong with:

> options(prompt = paste(format(Sys.time(), "%a %b %d %X %Y %Z"), ">"))
Fri Nov 19 09:30:53 2010 CST >
Fri Nov 19 09:30:53 2010 CST >
Fri Nov 19 09:30:53 2010 CST >

?

HTH,

Marc Schwartz