try this table(sci[,2]=0,sci[,1]=L)
Weidong Gu On Sat, Oct 22, 2011 at 7:51 AM, Adel ESSAFI <adel.s...@imag.fr> wrote: > Hello, > is there any help please. > Regards > > > 2011/10/21 Adel ESSAFI <adeless...@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 >> >> >> -- >> PhD candidate in Computer Science >> Address >> 3 avenue lamine, cité ezzahra, Sousse 4000 >> Tunisia >> tel: +216 97 246 706 (+33640302046 jusqu'au 15/6) >> fax: +216 71 391 166 >> > > > > -- > *PhD candidate in Computer Science > Address > 3 avenue lamine, cité ezzahra, Sousse 4000 > Tunisia > tel: +216 97 246 706 > fax: +216 71 391 166* > > [[alternative HTML version deleted]] > > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.