can you also post an example of A and an example of the expected result? On Tue, Mar 23, 2010 at 3:36 PM, Pj253 <pj...@cam.ac.uk> wrote: > > Thanks for your reply Ben! > > I don't think I want v to be identical to x... I guess I haven't put the > question in the right context. What I'm actually trying to do is... (* > indicates extra information, not necessarily relevant for my question, but > to help put it in context) > > A, some matrix (*a traceless, symmetric matrix of 0's, 1's (representing a > graph)*) > > x<-list() > x[[1]]<-1:nrow(A) > for (i in x[[1]]){ > if (A[1,i]==1) { > x[[2]]<-x[[1]][!(x[[1]]==1)] > for (j in x[[2]]){ > if (A[i,j]==1){ > path<-c(1,i,j) > print(path) > } > } > } > } > > So, here I have used i and j to range over the elements of x[[1]], x[[2]] > respectively. > (*This prints all the paths of length 2 starting at vertex 1. But I'm trying > to generalise this for a path of length nrow(A), i.e. a Hamiltonian path)*) > I want to iterate this process a certain number of times, so instead of i,j > I thought to use a list of scalars, v. > I don't want v to be identical to x... I want v to be a list of scalars > which range (inside a for loop) over an elements of the list x. (so instead > of for (i in x[[k]]) I have for (v[[k]] in x[[k]])). > > I can see how they look similar, but I do think they're different objects. > Hope this is clear. If you still think using 'x' itself would work, can you > explain how so? > -- > View this message in context: > http://n4.nabble.com/using-a-list-to-index-elements-of-a-list-tp1679184p1679253.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. >
______________________________________________ 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.