question about aggregate

Hi,
It is not what I want, but, thx anyway.
Regards


2011/10/22 Weidong Gu <anopheles123 at gmail.com>

try this

table(sci[,2]=0,sci[,1]=L)

Weidong Gu

On Sat, Oct 22, 2011 at 7:51 AM, Adel ESSAFI <adel.safi at imag.fr> wrote:

Hello,
is there any help please.
Regards


2011/10/21 Adel ESSAFI <adelessafi at gmail.com>

Hello
I am discovering R and I find it is really very powerful.

However, I find some newbie difficulties.

Here, I have a data frame with manu values that I want to calculate the
frequency (the nomber of line) of the some criteria.
For exemple here, ?I want it to print the number of occurence where
sci[,2]=0 and sci[,1]=L. In my exemple, he is printing the number of
the
line in the result data frame.
however, I have at least 90 line with sci[,2]=0 and sci[,1]=L.
Thank you in advance for any input.

?aggregate(sci[,5],list(sci[,2],sci[,1]),frequency)

? ?Group.1 Group.2 x
1 ? ? ?0.0 ? ? ? L 1
2 ? ? ?0.2 ? ? ? L 1


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PhD candidate in Computer Science
Address
3 avenue lamine, cit? ezzahra, Sousse 4000
Tunisia
tel: +216 97 246 706 (+33640302046 jusqu'au 15/6)
fax: +216 71 391 166