If you are trying to see if both vectors could be random samples from the same population then I would look at a qqplot (see ?qqplot) which will compare them visually (and if they are not the same length then the qqplot function will use interpolation to compare them. For a more formal test you can use the ks.test function (also can take vectors of different length), just note that a non-significant result does not mean that they are the same, and with big sample sizes this can be significant even though the differences are not practically meaningful. Another option is to do the qqplot along with the vis.test function in the TeachingDemos package, this lets you do a test based on the qqplot, but also gives you a feel for the practical difference.
On Sat, Mar 24, 2012 at 5:44 AM, Alaios <ala...@yahoo.com> wrote: > Dear all, > this is not strictly R question. I have two vectors of different length (this > is in the order of 10%). I am trying to see if still one can compare these > two for similarity. > > IF the vectors were of the same length I would just take the difference of > the two and plot a pdf of it. > > One way I am thinking is prorbably to find the longer length and short it in > some way to get to the length of the short. > > > Which are the math formulations for this type of problems and which of those > R supports? > > Regards > Alex > > [[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. -- Gregory (Greg) L. Snow Ph.D. 538...@gmail.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.
