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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