What does norm function indicate ?

I was coding my research paper and my collaboartor used norm(abs([max2,0,max1;0,theta,0]),2) term while coding. Can someone ellaborate what does this represent?

Answer 1

[Torsten]

From the MATLAB documentation:

n = norm(X) returns the 2-norm or maximum singular value of matrix X, which is approximately max(svd(X)).

In your case, X is the matrix abs([max2,0,max1;0,theta,0]).