Thanks, Richard, for your speedy reply!
> >From: Richard M. Heiberger <r...@temple.edu> >To: "Shi, Tao" <shida...@yahoo.com> >Cc: r-help@r-project.org >Sent: Tue, March 8, 2011 12:28:05 PM >Subject: Re: [R] confusion matrix > > >You need to make your variables into factors and specify the levels. > >> x <- c(1,3,4,5) >> table(x) >x >1 3 4 5 >1 1 1 1 >> factor(x) >[1] 1 3 4 5 >Levels: 1 3 4 5 >> table(factor(x)) >1 3 4 5 >1 1 1 1 >> table(factor(x, levels=1:5)) >1 2 3 4 5 >1 0 1 1 1 >> > > >Rich > >On Tue, Mar 8, 2011 at 3:22 PM, Shi, Tao <shida...@yahoo.com> wrote: > >Hi list, >> >>Is there already a function somewhere to output the confusion matrix from two >>input vectors? "table" always automatically delete rows or columns with all >>0's. For example, I would like the columns for "10" and "30" added back. >> >>Thanks! >> >>...Tao >> >> >> >> 20 40 50 60 70 80 90 100 >> 10 0 0 1 0 0 0 1 0 >> 20 1 2 0 4 0 0 0 1 >> 30 0 0 0 0 0 0 1 1 >> 40 0 0 1 1 2 0 0 0 >> 50 0 1 0 0 0 1 0 0 >> 60 0 0 0 0 0 0 1 1 >> 70 0 0 1 1 1 1 1 1 >> 80 0 1 0 0 0 0 0 1 >> 90 0 0 0 0 0 0 0 3 >> 100 0 0 0 0 1 0 0 3 >> >>______________________________________________ >>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. >> > [[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.
