get statistics by group

Thanks, it's helpful.
I'm wondering how to make the output look better.
Right now, I got the output look like this:

=======================================
$"apple"
              Fruit          Quty
  apple        :   72   Min.   :  12.00  
  banana       :    0   1st Qu.:  14.00  
  orange       :    0   Median :  22.00  
  cherry       :    0   Mean   :  25.00  
  mengo        :    0   3rd Qu.:  42.00  
  pineapple    :    0   Max.   :  70.00  
 (Other)       :    0                   


$"banana"
              Fruit          Quty
  banana       :   37   Min.   :  10.00  
  apple        :    0   1st Qu.:  13.00  
  orange       :    0   Median :  18.00  
  cherry       :    0   Mean   :  19.00  
  mengo        :    0   3rd Qu.:  32.00  
  pineapple    :    0   Max.   :  65.00  
 (Other)       :    0                   

......and so on........

=======================================


How to make it look like below and dilimited by Tab?


=======================================
        min   max  avg  median count
apple   12     70   25     22   72
banana  10     65   19     18   37
orange  19     50   27     25   52

....... and so on........

=======================================

You can try:

lapply(split(dset,dset$fruit,summary))

Tom Richards

-----Original Message-----
From: Yu-Ling Wu [mailto:yuling5 at yahoo.com]
Sent: Wednesday, March 14, 2001 6:11 PM
To: R-Help
Subject: [R] get statistics by group


Hi,

I have a data set look like this:

=================================
Fruit   Quty
apple   20
banana  10
orange  17
apple   30
apple   15
orange  26
banana  15
.........and so on ..........
=================================

The level of fruit is 30, that is, there are 30 
different fruits. I'd like to compute some simple 
statistics for each different fruit and get output

like this:

=================================
        min   max  avg  median
apple   12     70   25     22
banana  10     65   19     18
orange  19     50   27     25
....... and so on........
=================================

Please help me with this.

Thanks,
Yu-Ling Wu

__________________________________________________
Do You Yahoo!?
Yahoo! Auctions - Buy the things you want at great prices.
http://auctions.yahoo.com/
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._