Plotting points and lines

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alex
alex 2012-4-23
I have two arrays, one with points, and one of members saying which points they wish to connect. Below is the data. So essentially there is supposed to be points at (node_x,node_y). Then I would like to connect those points with 21 members ie size(member_nodes). For example, the first member should connect nodes 2 and 3 which are at points (0,0) and (5,0) respectively. Also if possible, it would be optimal to label what member/node is what on the plot. Thanks in advance, I realize this is a bit complicated.
node_x = [15.0, 0.0, 5.0, 10.0, 15.0, 20.0, 25.0, 30.0, 5.0, 10.0, 20.0, 25.0].';
node_y = [5.0 , 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 5.0, 5.0, 5.0, 5.0].';
member_nodes = [2, 3;
3, 4;
4, 5;
5, 6;
6, 7;
7, 8;
2, 9
3, 9;
3, 10;
4, 10;
4, 1;
5, 1;
1, 6;
6, 11;
11, 7;
7, 12;
12, 8;
9, 10;
10, 1;
1, 11;
11, 12];

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采纳的回答

Walter Roberson
Walter Roberson 2012-4-23
x_coords = [node_x(member_nodes), NaN(size(member_nodes,1),1)];
y_coords = [node_y(member_nodes), NaN(size(member_nodes,1),1)];
plot(x_coords(:), y_coords(:))
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Walter Roberson
Walter Roberson 2012-4-25
Sorry I glanced at this at work but didn't see anything obvious. I do not have access to MATLAB from home.
Walter Roberson
Walter Roberson 2012-4-25
alex, it looks like gplot() would help you.
http://www.mathworks.com/help/techdoc/ref/gplot.html
In your case, the adjacency matrix would be
accumarray(member_nodes, 1)

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