[R] get statistics by group

[Yu-Ling Wu]

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........

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




--- "Richards, Tom" <richards at pci.upmc.edu> wrote:
> 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


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