sorry, my mistake! the data frame should read: orig<-as.data.frame.table(orig) orig Var1 Var2 Freq 1 A A 40 2 B A 5 3 A B 30 4 B B 25
but basicaly i would simply like a sample of the original matrix ( which is a frequency table/contingency table/crosstabulation) hope this is clearer now! maja jholtman wrote: > > Not exactly clear what you are asking for. Your data.frame.table does not > seem related to the original 'orig'. What exactly are you expecting as > output? > > On Wed, May 21, 2008 at 10:16 PM, maiya <[EMAIL PROTECTED]> wrote: > >> >> i appologise for the trivialness of this post - but i've been searching >> the >> forum wothout luck - probably simply because it's late and my brain is >> starting to go.. >> >> i have a frequency table as a matrix: >> >> orig<-matrix(c(40,5,30,25), c(2,2)) >> orig >> [,1] [,2] >> [1,] 40 30 >> [2,] 5 25 >> >> i basically need a random sample say 10 from 100: >> >> [,1] [,2] >> [1,] 5 2 >> [2,] 0 3 >> >> i got as far as >> >> orig<-as.data.frame.table(orig) >> orig >> Var1 Var2 Freq >> 1 A A 10 >> 2 B A 5 >> 3 A B 30 >> 4 B B 25 >> >> and then perhaps >> >> individ<-rep(1:4, times=orig$Freq) >> >> which gives a vector of the 100 individuals in each of the 4 groups - >> cells, >> but I'm >> (a) stuck here and >> (b) afraid this is a very round-about way at getting to what I want i.e. >> I >> can now sample(individ, 10), but then I'll have a heck of a time getting >> the >> result back into the original matrix form.... >> >> sorry again, just please tell me the simple solution that I've missed? >> >> thanks! >> >> maja >> >> -- >> View this message in context: >> http://www.nabble.com/disaggregate-frequency-table-into-flat-file-tp17396040p17396040.html >> Sent from the R help mailing list archive at Nabble.com. >> >> ______________________________________________ >> 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<http://www.r-project.org/posting-guide.html> >> and provide commented, minimal, self-contained, reproducible code. >> > > > > -- > Jim Holtman > Cincinnati, OH > +1 513 646 9390 > > What is the problem you are trying to solve? > > [[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. > > -- View this message in context: http://www.nabble.com/disaggregate-frequency-table-into-flat-file-tp17396040p17403687.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
