R help - Apr 2004 - Looking for help in calculating percentiles

Hi All: 

I am working with a dataset on Arsenic toxicity, and I am trying to 
calculate the 20th, 40th, 60th, 80th, and highest percentiles for a 
variable, dietary Moisture (variable name dMoist). 

The inbuilt function quantile(dMoist) would print 0, 25th, 50th, 75th, and 
100th percentile. Does there exist a function that can calculate xth 
percentile (where x = 10th, 20th, ... etc) values? 

I looked for such functions in the documentation, but couldn't find one. Has
anyone written a similar function that can be used? Is there a module or a 
function that I have missed? 

I use R in both Windows XP as well as Linux (Fedora Core 1 (Yarrow)) on a 
Duron I Gz machine with 128 MB RAM. 

Thanks in Advance,
Arin Basu

> Hi All:
>
> I am working with a dataset on Arsenic toxicity, and I am trying to
> calculate the 20th, 40th, 60th, 80th, and highest percentiles for a
> variable, dietary Moisture (variable name dMoist).
?quantile
> quantile(rnorm(100),c(0.2,0.4,0.6,0.8,1))
       20%        40%        60%        80%       100%
-1.0023956 -0.2448597  0.2846434  0.8926857  3.0120353

On Mon, 26 Apr 2004 01:28:58 -0600
arinbasu at softhome.net wrote:
> Hi All: 
> 
> I am working with a dataset on Arsenic toxicity, and I am trying to 
> calculate the 20th, 40th, 60th, 80th, and highest percentiles for a 
> variable, dietary Moisture (variable name dMoist). 
Try 
?quantile




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