calculating quartils, tercils (or percentiles) Using R?

[Uwe Brauer]

Hi

I can use R to calculate quartils 
as in 
#+begin_src 

#+tblname: TC
| Data |
|------|
|    5 |
|   10 |
|   12 |
|   15 |
|   20 |
|   24 |
|   27 |
|   30 |
|   35 |




#+begin_src R :colnames t :var t1=TC 
 summary(t1)
#+end_src

#+RESULTS:
| Data          |
|---------------|
| Min.   : 5.00 |
| 1st Qu.:12.00 |
| Median :20.00 |
| Mean   :19.78 |
| 3rd Qu.:27.00 |
| Max.   :35.00 |
#+end_src

but I can't not find a way to calculate other percentiles, like terciles or so.

Does anybody know about this, or a org-function doing it?

regards

Uwe Brauer


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