# How to plot node numbers using matrix of nodes's coordinates?

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Vitaly on 18 Apr 2013
Answered: kyaw zaw on 8 Jul 2017
Hi, my script plots a mesh grid using:
where 'adj' is the adjacency matrix and 'NC' is the matrix of nodes' coordinates. It works absolutely fine, except for the fact that it doesn't plot the nodes' numbers on the graph.
For example, for a grid like this:
3-6-9
| | |
2-5-8
| | |
1-4-7
I need nodes' numbers to be on the graph and the nodes coordinates matrix is given by:
NC =
0 0
0 h
0 H1
w 0
w h
w H1
W1 0
W1 h
W1 H1
Where h's and w's are user's inputs.
The script also provides the matrix of nodes numbers, which for this example looks like this:
A =
1 4 7
2 5 8
3 6 9
I believe it is possible to use the above matrices to plot the nodes' numbers, but I don't know how. Any ideas?
##### 2 CommentsShowHide 1 older comment
Marcos Rezk on 13 May 2016
how do you get the adjacency matrix

Jonathan Epperl on 19 Apr 2013
And text() doesn't give you the results you'd like? E.g.
k = 1:30;
[B,XY] = bucky;
gplot(B(k,k),XY(k,:),'-o')
axis square
for i=k
text(XY(i,1),XY(i,2),num2str(i,'%d'))
end
If that's not good enough, we could certainly do some cosmetics on it...
Vitaly on 19 Apr 2013
That's perfect, thanks. I've modified it a little bit and got what I wanted.

kyaw zaw on 8 Jul 2017
Can We set locations of Nodes by coordination method? For example, Node1 is at x=3, y=4 of each axis. Please see following figure!In figure, all Nodes are located at wherever they want. We want to locate those Nodes systematically. Please answer is it possible or not!

kyaw zaw on 8 Jul 2017