[R] rate of change

[Liaw, Andy]

help.search() would be a good place to start for this kind of question, but
it's unlikely to be helpful in this particular case...

When I see "rate of change", I think of derivatives.  However, it's
difficult to say much without more detail on what you are looking for.
(What exactly do you mean by rate of change of a variable?)  There are many
ways to estimate derivatives in R, but which to recommend depends on your
particular application.

Cheers,
Andy

> From: Fred J.
> 
> Hello
> I am wondering, how do I find if R has a certain
> funciton to do a given task. do I just type
> help.search("rate").
> I am just trying to find a function to calculate the
> rate of change for a variable. I could come up with
> one if there isn't any allready builtin.
> 
> thanks
> 
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