Dear all, I have a txt file of the following format that describes the relationships between a network of a certain number of nodes.
{4, 2, 3} {3, 4, 1} {4, 2, 1} {2, 1, 3} {2, 3} {} {2, 5, 1} {3, 5, 4} {3, 4} {2, 5, 3} For example the first line {4, 2, 3} implies that there is a connection between Node 1 and Node 4, a connection between Node 1 and Node 2 and a connection between Node 1 and Node 3. The second line {3, 4, 1} implies that there is a connection between Node 2 and Node 3 as well as Node 4 and Node 1. Note that some of the nodes can be isolated (i.e., not have any connections to any other node) which is then indicated by {}. Also note that the elements in each row are not necessarily ordered (i.e., {4, 2, 3} instead of {2, 3, 4}). I would like to (a) read the txt file into R and (b) convert it to an adjacency matrix. For example the adjacency matrix corresponding to the aforementioned example is as follows: 0 1 1 1 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 1 1 0 1 0 0 0 0 0 Is there any convenient way of doing this? Thanks, Michael [[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.