Interesting Plots

1. General shape of an even element Magic Square:

plot(magic(16))

2. General shape of an odd element Magic Square:

plot(magic(15))

3.
x = -100:100;
y = -100:100;
[X, Y] = meshgrid(x, y);
figure
surf(x, y, X./Y)

4.  //2 b contin