thanks for your reply. your solution for 1,2,3 step worked for me and it reaches desired value for assortivity.degree in few seconds. Thanks & Regards Suvir
On Tue, Apr 23, 2013 at 12:22 AM, Tamás Nepusz <[email protected]> wrote: > > How to i make it to move in one direction(either towards more positive or > > more negative) of values? > Well, you write your own rewiring function that strives to increase or > decrease assortativity explicitly ;) The degree-preserving rewiring > implemented in igraph does not care about assortativity at all. > > A (probably) slow way of doing what you want would be as follows: > > 1. Calculate the assortativity of your current graph. > 2. Rewire your original graph using a small value for the "niter" > parameter of rewire(); maybe try with niter=10 first. > 3. Calculate the assortativity of the rewired graph. If it went in the > desired direction, keep the rewired graph and go back to the previous step > to keep on rewiring. Otherwise, keep the original graph before the last > rewiring step and try again from step 2. > > The reason why I'm saying that it's probably slow is because there is a > constant overhead associated with the rewire() call since it makes a copy > of your graph (this is the standard way of doing things in R). If your > graph is large, the cost of copying will dominate the cost of making a > single rewiring step. > > -- > T. > _______________________________________________ > igraph-help mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/igraph-help >
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