[R] grouping

[Petr Savicky]

On Tue, Apr 03, 2012 at 09:31:29AM -0400, Val wrote:
> Thank you all (David, Michael, Giovanni)  for your prompt response.
> 
> First there was a typo error for the group mean it was 89.6 not 87.
> 
> For a small data set and few groupings I can use  prob=c(0, .333, .66 ,1)
> to group in to three groups in this case. However,  if I want to extend the
> number of groupings say 10 or 15 then do I have to figure it out the
>   split(x, cut(x, quantile(x, prob=c(0, .333, .66 ,1))
> 
> Is there a short cut for that?

Hi.

There may be better ways for the whole task, but specifically
c(0, .333, .66 ,1) can be obtained as

  seq(0, 1, length=3+1)

Hope this helps.

Petr Savicky.