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 Author Comment/Response Zhiyu Fan 09/24/10 11:12am In Response To 'Re: how construct a graph'---------thank for your suggestion. points = Flatten[Table[{x, y}, {x, 3}, {y, 3}], 1] {{1, 1}, {1, 2}, {1, 3}, {2, 1}, {2, 2}, {2, 3}, {3, 1}, {3, 2}, {3, 3}} i believe Norm[points[[i]] - #] calculate the distance between the two vertices, if {{1, 1}, {1, 2}, {1, 3}, {2, 1}, {2, 2}, {2, 3}, {3, 1}, {3, 2}, {3, 3}} are the same as the coordinate of every vertex. In this case the vertex coordinate in Graph g = GridGraph[3,3]are same as the list points. connectingPoints = Table[Select[points, Norm[points[[i]] - #] <= 1 &], {i, Length@points}] Therefore i believe that pointsSet = Flatten[Table[ Map[{points[[i]], #} &, connectingPoints[[i]]], {i, Length@points}], 1] calculate only the vertices coordinate set not the edges set. URL: ,

 Subject (listing for 'how construct a graph') Author Date Posted how construct a graph Zhiyu Fan 09/20/10 05:41am Re: how construct a graph Daniel Z-S 09/23/10 3:20pm Re: Re: how construct a graph Zhiyu Fan 09/24/10 11:12am Re: Re: Re: how construct a graph Daniel Z-S 09/30/10 11:40am
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