Assigning the number for each x and y in the plot?

Hi All, I have a matrix with 3 column and I should say the first column indicates the x position of nodes, second column indicates the y position of nodes and third column is node number. I am going to see plot x and y which shows the node number for each of them. I know for plotting I should used the following Plot (nodes(:,1), nodes(:,2)) It works but my problem is that I don't know how I can have a number of nodes (column 3) in the plot?? because the main goal is that to plot specific nodes location. I would appreciate if you please guide me to solve that.

Many thanks

Answer 1

[KSSV]

N = 10 ;
A = rand(10,2) ;
nodes = [1:N]' ;
A = [A, nodes]  ;
plot(A(:,1),A(:,2),'.r') ;

hold on

text(A(:,1),A(:,2),num2str(nodes))

[maedeh amirpour]

Many thanks, Perfect

Answer 2

[maedeh amirpour]

Hi again Please have a look at my plot (attached). As the matrix is huge I cannot see the node number. Is there any ather wa

y? Regards