How to build an adjacency matrix?

I have a matrix of thirty rows and 2 columns how do I put this data into an adjacency matrix of 12x12. So that the new matrix has zeros where there is no point an a 1 where there is a match in the first matrix.

Answer 1

[Walter Roberson]

https://www.mathworks.com/help/matlab/ref/graph.html#inputarg_st

G = graph( YourMatrix(:,1), YourMatrix(:,2) );

and then if you still need it,

adjacency(G)