WOW. Is it really that compact? I will give it a try. Amazing if true. Thanks.
Patrick Burns wrote: > > You need a comma (,) not a dot (.) in your > subscripting of the matrix. If I get the question > correctly, you want: > > newTS2 <- perm[100, TS2] > > > Patrick Burns > patr...@burns-stat.com > +44 (0)20 8525 0696 > http://www.burns-stat.com > (home of "The R Inferno" and "A Guide for the Unwilling S User") > > onyourmark wrote: >> Hi. >> newTS2 =(perm[100.TS2[1]]. perm[100.TS2[2]]. perm[100.TS2[3]]. ... , >> perm[100.TS2[2000]]) >> >> newTS2 is supposed to be a vector of 2000 values. >> The first value is supposed come from a particular element of the matrix >> called 'perm'. >> >> I thought that >> perm[100.TS2[1]] >> would be valid code in R to refer to that element. >> It is meant to choose the element from 'perm' in the 100th row and in the >> column indicated by >> TS2[1]. In other words, TS2[1] is the first element in the TS2 vector. >> >> For example, if the first element in the TS2 vector was 5 then I would >> want >> to choose the (100,5) element from perm to be the first entry in >> newTS2. >> >> Does this make sense? Thanks. >> >> onyourmark wrote: >> >>> Hi. I am sure there is a better way in R to do this then using a loop >>> but >>> I >>> am new to it and not sure what to do. I think it might be something >>> about >>> using a function as an argument but not sure. >>> >>> I have a 1 x 2000 vector TS2 which has entries from the set {x: x is in >>> Z >>> and 0<x<8} (where Z is the set of Integers). >>> >>> Then I also have a 5050 x 7 matrix called 'perm' whose entries are also >>> from >>> the set {x: x is in Z and 0<x<8} >>> >>> I want to construct the following transformation of TS2 which will still >>> be >>> a vector of size 1 x 2000 and which I will call 'newTS2' such that: >>> >>> newTS2 =(perm[100.TS2[1]]. perm[100.TS2[2]]. perm[100.TS2[3]]. ... , >>> >> >> Perhaps you can explain what the last line is supposed to do? This is >> invalid R code and also not a known mathematical notation for me .... >> >> Uwe Ligges >> >> >> >>> perm[100.TS2[2000]]) >>> >>> Is there a nice way to do this without a loop? >>> >>> Thank you. >>> >> >> ______________________________________________ >> 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. > > -- View this message in context: http://www.nabble.com/how-to-do-this-%22the-R-way%22-tp22864354p22881206.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.
