On Wed, Mar 5, 2014 at 11:17 AM, Steve Boudreault <[email protected] > wrote:
> > > > But I'd prefer you tell us want you want to do, and then we don't need > > to > > guess. > > > > Please look at the following image : > > http://inspirehep.net/record/833443/files/mst.png > > These are "minimum spanning tree" (right?) of stars distributed in X (i.e. > right ascension, RA) and Y (i.e. declination, DEC). You have this for > three open clusters : IC2391, M34, M11. > Again. The minimum spanning trees in igraph are defined for graphs (=networks), not for points: http://en.wikipedia.org/wiki/Minimum_spanning_tree Maybe you want this: http://en.wikipedia.org/wiki/Euclidean_minimum_spanning_tree Do you? This *is* what I want to do. I want to do a plot like this. > This is not an explanation, I am sorry. What is the rule to connect the dots? Maybe this is evident for people in your field, but not to me. G. [...]
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