FAQ 7.31
2010/3/11 Lilia Leticia Ramírez Ramírez <llramirezrami...@gmail.com> > Hello All, > > I would like to report the following bug or maybe you can explain if I am > wrong. > > I am sampling from two different populations with weights. The two > populations have the same age groups and I want to distinguish where I am > sampling from. That is why I am using a matrix such as: > matrix > age.group Male Females Weight.Males Weight.Females > 1 1.1 1.2 > 3 4 > 2 2.1 2.2 > 6 5 > 3 3.1 3.2 > 3 5 > 4 4.1 4.2 > 9 2 > > If a sample a element: > uno<-sample(matrix[,2:3],1,prob=matrix[,4:5]) > I want to be able to recover from wich age.group and sex the individual is, > but > > as.integer((uno-round(uno))*10) is equal to 0 when uno is male, while it > is > 2 when a female. That is, for example: > > as.integer((4.1-round(4.1))*10) is equal to 0 (instead of 1) > > The rounding error is eliminated for > as.integer((uno[j,2]-round(uno))*11) since it is equal to 1 when male and > 2 when female. > > I noticed this problem when trying to use > > other.matrix[j, (uno[j,2]-round(uno))*10)] > > for a matrix with information with first information about males and second > column about females. > > Thank you kindly. > Lilia > > [[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<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 that 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.
