Randomness of magic function

Hi

I'm a bit of a newbie.

I executed the following lines in the console.

a = magic(100)
x = a(37,:)
y = a(81,:)
plot(x, y, 'go', 'LineWidth', 2, 'MarkerFaceColor', 'r', 'MarkerSize', 6)

And here is the plot.

What's with the clustering at the top-left and bottom-right, and the linear nature within those clusters? It's not a problem, just trying to understand how the randomness of the "magic" function works.

Thanks.

Answer 1

[Walter Roberson]

magic() is not random at all. It always returns the same output for the same input. magic() constructs magic squares

Answer 2

[anroy]

Ah, OK, got it. Sorry I should have checked the Help. Thanks Walter.