Perhaps I misunderstand your request, but isn't this just: sum( (sci[,,2]==0L) & (sci[,1] =="L"))
with the usual floating point caveats. Michael On Sat, Oct 22, 2011 at 8:19 AM, Adel ESSAFI <adeless...@gmail.com> wrote: > Hi, > It is not what I want, but, thx anyway. > Regards > > > 2011/10/22 Weidong Gu <anopheles...@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.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. >> > > > > -- > 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 > > [[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.
