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I need to plot something that has nodes Numbers and Coordinates as in the attached file: Data_Coord.txt

the file has four columns and they correspond to: NodeNumber CoordX CoordY CoordZ, respectively

The conectivity between nodes is given by the file Data_Conec.txt

the file has three columns and they correspond to: ElementNumber Node1 Node2, respectively

Note that the number of the nodes is not sequential up to the total number of nodes, meaning that, for example, I could have node 1 conected to node 10001, even though I only have 200 nodes. but the coordinate of node 1 and 10001 is given on the Data_Coord.txt file and the first column specifies the number of the node.

How can I plot this 3D sketch?

I tried using digraph but because of the node numbers I wasnt sure how to proceed

thanks,

Christine Tobler
on 20 Jan 2021

Christine Tobler
on 20 Jan 2021

Hi Conrado,

If E1, E2 are the second and third column of Data_Conec.txt, and Node_Coord is the first column of Data_Coord.txt, use

G = digraph(string(E1), string(E2), [], string(Node_Coord));

plot(G,'XData',X_Coord,'YData',Y_Coord,'ZData',Z_Coord,...

'ArrowSize',10,'NodeLabel',G.Nodes.Name);

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